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  #1  
Old 09-12-2010, 09:19 PM
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Question Storm Lake 40-to-9 Compact Conversion Barrel

I was going to purchase a Storm Lake 40-to-9 Compact Conversion Barrel from Midway USA until I read the one and only review which stated that the barrel was not 'drop-in' and required gunsmithing.

Has anyone purchased this particular conversion barrel for their M&P 40 Compact? If so, what is your experience?

The Storm Lake website says that this conversion is 'drop-in and requires no gunsmithing.'

The reviewer on Midway USA website remarks are perplexing because I currently own a Glock 23 .40 caliber model which I purchased a Storm Lake 40-to-9 Conversion Barrel for. It 'drops-in' with no issues and did not require any gunsmithing. I just dropped it in and and starting using it (of course I had to purchase 9mm mags to do so). Incredibly accurate, fit and finish.

I appreciate any feedback on this issue. Thanks.

Dr. C.

Last edited by f9dak9; 09-15-2010 at 07:27 PM.
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  #2  
Old 09-13-2010, 11:35 PM
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Sent Storm Lake an email after I posted the initial thread. David from SL said that ALL M&P barrels made by them are 'DROP-IN & REQUIRE NO MODIFICATIONS.'

I'm going to buy the conversion barrel and let the forum know once I get it and try to install it.
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  #3  
Old 09-16-2010, 10:31 AM
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I am looking to do the same. I would be interested in how this works for you.
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  #4  
Old 09-16-2010, 01:25 PM
8th SPS USAF 8th SPS USAF is offline
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Default 40 to 9 bbl

I am thinking of getting one for my 40FS . Waiting to hear. On a forum

someone stated the SL bbl shot low in his gun. I do not remember

which gun. Maybe op err? Thank you

8th

Last edited by 8th SPS USAF; 09-16-2010 at 11:39 PM.
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  #5  
Old 09-16-2010, 11:13 PM
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Default Thanks for the responses, I will update soon

I'll be ordering the SL 40to9 Compact Conversion barrel tomorrow, but won't be able to DROS my new 40C until the 24th, then pick it up 10 days later, then get to the range to fire it with the conversion (California gun laws are insane). As soon as I do, I'll post my findings that evening. Stay tuned...

As far as accuracy, I'll hoping that it's just as accurate as my SL 40to9 conversion barrel for my Glock 23. It's capable of greater accuracy than the 40 barrel that came with the pistol. Part of that is the amazing fit/tolerances of the SL barrel and that 9mm is easier for me to control. And as far as dependable, I have 300 down the SL barrel in my G23 and I've never had an FTF or FTE. Just perfect.

Last edited by f9dak9; 09-19-2010 at 07:38 AM. Reason: Add comment
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  #6  
Old 10-02-2010, 04:34 PM
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Cool Update

Got the SL 9mm Conversion Barrel for M&P 40C. Will pickup M&P 40C on 10/4. Will test on 10/15 and post results.
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  #7  
Old 10-09-2010, 06:38 PM
Rooski41 Rooski41 is offline
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I'm thinking of this for my M&P C also. Will be interested in your results...
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  #8  
Old 10-18-2010, 10:41 PM
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Finally got to put the SL 9mm conversion barrel through it's paces and I'm very happy to report that I shot 200 rounds through it this past Friday. Here's the details...

50 rounds of Remington Gold Dot JHP
50 rounds of Winchester PDX1 JHP
50 rounds of Hornady TAP JHP
50 rounds of Winchester FMJ

All fired without any FTF or FTE. I will use my Compact most of the time as a 9mm loaded with Hornady TAP JHP.

I can't say enough positive things about SL barrels-reliable, fit, finish-amazing.

One other thing, I also shot it with the factory 40 barrel and put a 100 rounds of UMC down range through it and had one FTE!

Last edited by f9dak9; 10-18-2010 at 10:42 PM. Reason: typos
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  #9  
Old 10-18-2010, 10:56 PM
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Default One other thing...

The recoil of the 9 was significant. I definitely shot tighter groups with it. The 40 compact barrel on the other hand was not as snappy as I thought it was going to be. It to was manageable for it 3.5" length and shot decent small groups. Overall, I will probably use my compact more as a 9 with some effective JHP for SD.

PS. sent in my rebate for two 9mm compact mags on 9/24 and just got them in the mail today. That was faster than my last rebate which took four weeks to get two full size 40 mags.
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Old 10-18-2010, 11:09 PM
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You need to try 357Sig next.
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  #11  
Old 10-19-2010, 12:51 PM
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Quote:
Originally Posted by f9dak9 View Post
The recoil of the 9 was significant. I definitely shot tighter groups with it. The 40 compact barrel on the other hand was not as snappy as I thought it was going to be. It to was manageable for it 3.5" length and shot decent small groups. Overall, I will probably use my compact more as a 9 with some effective JHP for SD.

PS. sent in my rebate for two 9mm compact mags on 9/24 and just got them in the mail today. That was faster than my last rebate which took four weeks to get two full size 40 mags.
Thanks for giving us this feedback on the conversion barrel.

I saw you mentioned the 9 recoil was significant. Can you expand on this? How did it compare to the orginal 40 barrel in recoil and controlability?
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  #12  
Old 10-26-2010, 09:58 AM
JayKay1947 JayKay1947 is offline
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Default INTRODUCTION

Hey everyone... New to the forum. Especially interested in this Storm Lake conversion topic. Just purchased an M&P compact 40 cal. What are the reviews on converting to a 9mm for target shooting since ammo is less expensive. Plan to carry as 40 cal. however.
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  #13  
Old 10-26-2010, 10:03 AM
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Default INTRODUCTION

Hey Everyone, New to the forum. Especially interested in the Storm Lake 9mm conversion kit for an M&P compact 40 cal. that I just purchased. Any reviews on your experience?

Thanks
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  #14  
Old 10-26-2010, 10:13 AM
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Is the breach face on a 9 and 40 the same? Reason I'm wondering is can you go in the other direction, ie convert a 9mm to 40? I suspect the 9mm breachface is smaller and that this mod isn't possible, but ya never know for sure until you ask.
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  #15  
Old 10-26-2010, 07:52 PM
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I have been doing a little research on this, even emailed Storm Lake. Their marketing guy responded by said that all you have to do is buy the conversion kit along with S&W 9mm factory magazine and you're in business, no need for a gunsmith. Think you are right, cannot go from 9mm to 40. That was a question as well for me, however that option is NOT offered on the site.
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  #16  
Old 11-03-2010, 08:39 PM
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Quote:
Originally Posted by epj View Post
Is the breach face on a 9 and 40 the same? Reason I'm wondering is can you go in the other direction, ie convert a 9mm to 40? I suspect the 9mm breachface is smaller and that this mod isn't possible, but ya never know for sure until you ask.
I'm almost positive it will not work. Another thing to keep in mind, that I have yet to prove but will one day when I get my hands on a .40 M&P at the range, is the .40 mags will most likely run 9mm.

The round markers will be useless, but I remember back during the AWB days, people would buy Beretta .40 mags for their 9mm guns to squeeze in 12 rounds. Reliability can be iffy on certain magazines, but I believe the M&P .40 mags would run 9mm just fine. And it makes a conversion a little more affordable.

Anyone here that can try this?

Steve
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  #17  
Old 11-04-2010, 01:31 PM
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Default Storm Lake 40 to 9

Tried it yesterday and was fairly happy with its performance. Shot 80 rounds. I also noticed more "kick" than with my usual 40 shooting (these were 115 grain and I usually shoot 185 in the 40s).

Unfortunately, I had 3 ejection problems. Not sure if it was the magazine (new S&W model) or the ammo (Federal from Walmart and Independence from the range store - to test two kinds).

Anyway, I'm happy with the money I spent for the two items.

jh
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  #18  
Old 11-05-2010, 02:00 PM
8th SPS USAF 8th SPS USAF is offline
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Default SL conv bbl

Question: Anyone who bought a Storm Lake 40/9 conv bbl for MP,

have a bbl ramp that looks like it was sheared off? I bought a used

bbl from a guy on another forum and after I cleaned it, I found the

bottom of the ramp ruff and looked like it was cut with a big shear.

I think I have it smoothed out and will try it out soon. Test it Sat

with dummy rounds and see if it will feed. Thank you

8th

PS: No reply from the guy who I bought it from?
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  #19  
Old 04-19-2011, 12:41 PM
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Default Problems with Storm Lake Barrel

I just received a SL conversion barrel from personalsecurityzone.com, but it was most definitely not drop-in ready. It seemed to go in nicely with the spring tension rod, but then I could not pull the slide all the way back for the release lever to turn in that area machined in the side of the slide for that purpose. With great effort was I able to turn the release lever back to the horizontal position to get ready to fire. Then with a 9mm magazine inserted and drawing back on the slide, a bullet would not chamber. Again with great effort because I couldn't pull the slide all the way back, it was a struggle to turn the slide release. Once I did, the slide would not go forward until I hit it with the palm of my hand. Taking the barrel out to compare with the .40 cal barrel, I noticed that the S&W barrel is beveled on the top and bottom (more on the top), and the SL barrel wasn't beveled at all on the crown at the base of the cylinder part of the barrel. I don't know if that was the problem, or maybe the machining at the other end. I emailed Personal Security and they were very apologetic and suggested first that I contact Storm Lake and went on to say that they were having many customers complain about Storm Lake--so much so that they may consider dropping them from their inventory. I just called Storm Lake and they, too, were very apologetic and sent me an RA and mailing label for an exchange. We'll see what happens from here, and I'll post. I think we will all be interested in how this comes out because no gun-smithing should be required on a "drop-in, ready to use" barrel. They are pricey enough.
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  #20  
Old 04-19-2011, 02:38 PM
7strider77 7strider77 is offline
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I've used a Storm lake 9-40 conversion in my .40c quite a bit (probably less than a thousand rounds, but getting there). Here are a few answers from my experience:

To the last post, my barrel functioned well out of the box, but I know of others that did not. In every case Storm Lake made good, and did so quickly.

Fit and finish is not great. I've yet to see one (including mine) that is completely smooth and uniform, but the vast majority seem to function fine. That's all relative anyway, we're not shooting high-end target pistols here!

You cannot convert from 9mm to .40, only from .40 down to either 9 or .357Sig.

You have to use 9mm mags, but if you convert down to .357, your .40's will work fine (they're actually the same).

I've had way to many failures to eject to use this conversion as a defense tool, but its quite reliable enough to practice with, and certainly reduces the cost for non-re-loaders! In fact, its good to have a FTE once in awhile, just to make sure you're ready to deal with it! My .40's have been "completely" reliable for thousands of rounds, so I don't get any practice with malfunctions unless I design the problem!
Its my humble opinion that the cause of the FTE's is directly related to why you can only convert "up" in caliber, and not down. The ejector is simply further away from center on a .40 than on a 9, so its not getting quite as firm a hold on it.
Again, if I was going to actually "use" a 9mm for self-defense, I'd buy another M&P in that caliber. The conversion is just not up to par with the real thing.

The 9mm barrel is equally accurate in my compact.

I experience the reduced recoil of the 9mm. I'm not sure what's happening in previous posts that mention an increase in recoil, the 9mm kicks less than the .40, all other things being relatively equal.

I really like mine, and think its a fun addition to the toybox! I would not pay market value, but made the conversion for about a hundred (barrel & mag) by patiently watching the web.
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  #21  
Old 04-19-2011, 03:28 PM
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You guys would be better off just dropping a stock S&W 9mm barrel in your .40 like so many others have done on this forum. None of them have had all these problems, or at least they haven't posted anything about problems....
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Old 04-19-2011, 08:05 PM
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Quote:
Originally Posted by Lost Lake View Post
You guys would be better off just dropping a stock S&W 9mm barrel in your .40 like so many others have done on this forum. None of them have had all these problems, or at least they haven't posted anything about problems....
Not sure who you refer to as "so many others" I'd like to hear more about it from them here. Maybe they can share their experiences here. How bout you Lost Lake, how has your S&W9 barrel worked in your 40cal?

As for the people having trouble with the S\L barrel, that stinks and I for one am disturbed to hear this. My 9mm conversion has been excellent, had a couple hiccups in the first 50 rounds or so, but has been flawless since. Not sure about my Sig357 yet, not enough rounds through it. But have had zero problems.
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Old 04-19-2011, 09:05 PM
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I'll do the search for you, happy to help. Here's one of my favorite write ups, but there's plenty more, just ask me to search for them for you if you would like, I know how to use the search function and I enjoy helping you out in any way I can!

Test-9mm factory barrel in M&P 40-

There is a post where a fellow called and asked S&W if he could use the stock 9mm barrel in a stock .40 and the S&W rep said he couldn't verify it would work, then the rep said "wink, wink" which I take as "yes it will work just fine", but you can take it any way you'd like. Please let me know if you'd like me to search for that thread for you and I will do it, I just love doing research for folks that are really busy or don't feel comfortable using the search function. Hey it's just me, I'm okay with it, really!

Of course if you are in any way uncomfortable using the S&W 9mm barrel in the S&W .40 gun, then I wouldn't do it. For only about twice the price the Storm conversions have worked most of the time and except for a bunch of jams and misfeeds, they seem to be okay, also their customer service while replacing bad barrels is just great folks here say. Just call them up and they will send a ticket for the defective barrel. You just can't beat that kind of service!

Happy shooting!

Last edited by Lost Lake; 04-19-2011 at 09:08 PM.
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Old 04-19-2011, 09:37 PM
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Ok Lost, thanks for the effort, but there was nothing, zero, zilch there... the op did it, posted once and nothing since... so that was a wasted look... ok, back to you, what is your experience... you seem to know what up, give us your experience. You have a 40 with a SW9 barrel right?
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Old 05-01-2011, 04:31 PM
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Quote:
Originally Posted by Lost Lake View Post
I'll do the search for you, happy to help. Here's one of my favorite write ups, but there's plenty more, just ask me to search for them for you if you would like, I know how to use the search function and I enjoy helping you out in any way I can!

Test-9mm factory barrel in M&P 40-

There is a post where a fellow called and asked S&W if he could use the stock 9mm barrel in a stock .40 and the S&W rep said he couldn't verify it would work, then the rep said "wink, wink" which I take as "yes it will work just fine", but you can take it any way you'd like. Please let me know if you'd like me to search for that thread for you and I will do it, I just love doing research for folks that are really busy or don't feel comfortable using the search function. Hey it's just me, I'm okay with it, really!

Of course if you are in any way uncomfortable using the S&W 9mm barrel in the S&W .40 gun, then I wouldn't do it. For only about twice the price the Storm conversions have worked most of the time and except for a bunch of jams and misfeeds, they seem to be okay, also their customer service while replacing bad barrels is just great folks here say. Just call them up and they will send a ticket for the defective barrel. You just can't beat that kind of service!

Happy shooting!
Will this work for an M&P Pro as well?
I have an M&P Pro in .40 and i'm looking for a Barrel config to shoot 9MM in my IPSC matches,please ANY LIGHT YOU CAN THROW ONTO THIS WILL BE APPRECIATED.
Also do you guys know where can i buy such a barrel?Please let me know
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  #26  
Old 05-03-2011, 09:24 PM
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I ordered my SL 9mm conversion barrel on Apr. 6, received it Apr. 17. Since it was not machined correctly, I sent it back to SL on Apr. 18. I received it back May 2 with the message that it was re-machined in one area and everything else was found to be within tolerances. I was very anxious to try it, only to find although slightly improved that I could still not pull the slide all the way back or chamber a bullet. Another RA and label was sent to me and I returned it once again today, May 3. My only comment is, do these guys even try their barrels in the pistols they are made for...something called quality control? I wish I had simply ordered a barrel directly from S&W!
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Old 05-04-2011, 06:27 PM
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Default My experience

Have a SL conversion for my .40c. Dropped in with no issues. Have fired 300 rounds with no malfunctions. I now use it more than the stock .40 barrel.
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  #28  
Old 05-08-2011, 06:46 PM
rockopr rockopr is offline
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Quote:
Originally Posted by Knochen View Post
I ordered my SL 9mm conversion barrel on Apr. 6, received it Apr. 17. Since it was not machined correctly, I sent it back to SL on Apr. 18. I received it back May 2 with the message that it was re-machined in one area and everything else was found to be within tolerances. I was very anxious to try it, only to find although slightly improved that I could still not pull the slide all the way back or chamber a bullet. Another RA and label was sent to me and I returned it once again today, May 3. My only comment is, do these guys even try their barrels in the pistols they are made for...something called quality control? I wish I had simply ordered a barrel directly from S&W!

Can you order barrels directly from S&W?
Can you provide a number if so?I want to order a 5" in 9MM for my M&P40 and if they're cheap enough i will order one in .357 sig as well.
Any help will be appreciated,thanks...
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  #29  
Old 05-23-2011, 06:43 PM
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Okay, guys...the final verdict...well, short of firing my pistol!
I finally received my 9 mm conversion barrel today (May 23) from Storm Lake. Third time is a charm! I put it in my .40c reluctantly (not wanting to be disappointed again), inserted the standard sized magazine, drew back the slide....and for the first time ever a 9 mm bullet was chambered. Relieved I continued to draw back the slide until the mag was emptied!
I'm sure it's as it should have been from the beginning. I'm just anxious now to go to the range to confirm there are no jams.
So...to Storm Lake's credit, they twice gave me a RA and mailer and made good on their product.
If I were to do it again, I would most likely simply buy one from S&W as some have suggested. I am not sure of the cost differential. I'm just happy it now appears to work as it should.
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Old 05-24-2011, 07:55 AM
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Quote:
Originally Posted by rockopr View Post
Will this work for an M&P Pro as well?
I have an M&P Pro in .40 and i'm looking for a Barrel config to shoot 9MM in my IPSC matches,please ANY LIGHT YOU CAN THROW ONTO THIS WILL BE APPRECIATED.
Also do you guys know where can i buy such a barrel?Please let me know
I'm wondering the same thing. I am considering purchasing a M&P 40 pro w/5" barrel for target practice & would like to convert it to 9mm for the range then back to 40s&w or 357sig for home defense. If this works as well for the M&P pro w/5" barrel as they say it does for the compacts then it would be the answer for me. If not then the Glock 35 is in my future. Very interesting. (I bumped the other thread to the top hoping for some more info on this topic.)

Oh, also I am currently running a Storm Lake conversion barrel on my Glock 27 & it has been perfect. I am disturbed to hear that some M&P barrels from them are not up to the standards that I've seen in their Glock barrels. What a shame...
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Old 05-12-2012, 03:52 PM
markfi markfi is offline
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Default Conversion

Remember if you are shooting weak 9mm in your conversion barrel, you may want to use the 9mm recoil spring assy. The 40 cal recoil spring assy uses a heavier spring. With most 9mm this is not a problem, but with a few brands of 9mm the slide may not cycle fast enough, them you need the lighter spring.
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  #32  
Old 05-12-2012, 04:45 PM
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Quote:
Originally Posted by markfi View Post
Remember if you are shooting weak 9mm in your conversion barrel, you may want to use the 9mm recoil spring assy. The 40 cal recoil spring assy uses a heavier spring. With most 9mm this is not a problem, but with a few brands of 9mm the slide may not cycle fast enough, them you need the lighter spring.
Hate to disagree with you Mark, but that is not true. The recoil rod assy. is the same for both the 9 and the 40fs guns, same part # 279740000. I can't say that I have shot all kinds of ammo, but I do have the Storm\lake conversion barrel and have never had any kind of problems, been using for about 2 years. I often change barrels in the middle of a range session and it doesn't skip a beat.
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Old 05-12-2012, 06:48 PM
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I have two M&P 40's one a compact and one 4.25" full size. For my compact I have a Storm Lake 3.1" 357SIG barrel and it works quite well and is very accurate.

In my 40 fullsize I have a Smith & Wesson full size 357SIG barrel which I just shot this afternoon after getting off work. It also works flawlessly of course at $30 for 50 rounds I do not shoot the 357 that much, and I will state that it is very loud and the recoil is much more than that of the snappy 40, as a matter of fact after I shot all my 357 ammunition, I broke the gun down and put the 40 barrel back in and loaded up with 40 cal 180 grain Winchester White box FMJ and the difference was amazing I remember hey why is there so little kick to this gun and it is not so noisy. Even with ear muffs on I definitely could tell that the 357 is extremely loud, so even if you are not the worlds greatest shot just the powerful blast of a 357SIG at 125 grain is deafening and scary!
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Old 05-13-2012, 12:29 AM
BobFr BobFr is offline
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Quote:
Originally Posted by Houdini1953 View Post
I have two M&P 40's one a compact and one 4.25" full size. For my compact I have a Storm Lake 3.1" 357SIG barrel and it works quite well and is very accurate.

In my 40 fullsize I have a Smith & Wesson full size 357SIG barrel which I just shot this afternoon after getting off work. It also works flawlessly of course at $30 for 50 rounds I do not shoot the 357 that much, and I will state that it is very loud and the recoil is much more than that of the snappy 40, as a matter of fact after I shot all my 357 ammunition, I broke the gun down and put the 40 barrel back in and loaded up with 40 cal 180 grain Winchester White box FMJ and the difference was amazing I remember hey why is there so little kick to this gun and it is not so noisy. Even with ear muffs on I definitely could tell that the 357 is extremely loud, so even if you are not the worlds greatest shot just the powerful blast of a 357SIG at 125 grain is deafening and scary!
I have a couple SIGs, a P226 (FS) and a P239 (compact) that each have .40, .357, and aftermarket Barsto 9mm barrels, and I agree about the loudness and snappiness of the .357 SIG. People nearby will sometimes comment about the loudness and long flame when firing the .357 rounds. I hope to get a .40 Shield soon, and then at some point a StormLake 9mm for it. For me I suspect a .357 barrel for the Shield may be a little much, however.
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Old 05-14-2012, 06:33 PM
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The guns are inexpensive in relation to say a Sig or HK. Just BUY another gun!!! You really don't need the 40 anyway. Just run 147+P Federal HST or 124 +P Gold Dots. Both cheaper options for all the trouble!
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