In need of a threaded barrel for M&P 9 core
- Thread starter barry1me
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I didn't know Lone Wolf made barrels for anything other than Glock. I have their barrels in my Glocks, they make good stuff for much less than KKM. Do you have a link where I can find their M&P barrels?
Smaay
Member
i have a Storm Lake barrel in my CORE. no problems at all, shoots good.
have you shot 147grain bullets out of it? If so how is your accuracy?
Smaay
Member
I shoot 124gr 9mm through my gun only. accuracy is awesome. in fact my shot groups were better than the OEM barrel.
let me give you some background too. Im using a .40 CORE with a Storm Lake 9mm conversion barrel. so my shot groups are tighter with the 9mm barrel over the .40 barrel
let me give you some background too. Im using a .40 CORE with a Storm Lake 9mm conversion barrel. so my shot groups are tighter with the 9mm barrel over the .40 barrel
My vote goes to KKM, I had a SL and had to return it. I was having numerous problems with it and evidently was told by SL that they were still using the old style barrel. KKM is modeled on the new style. It is a very accurate barrel.
I just had a very odd conversation with customer service at Smith and Wesson. I asked them if they make a threaded barrel for the M&P 9mm and they said they do, I said great I would like to buy one. He said not possible. I said why not, he said I dont know and was super rude about it. I told him that I can not find a aftermarket barrel that has a 1-10 twist like stock and he said yeah you wont find one. I said Im disapointed because I specifically bought this gun to run my suppressor with it and now I cant even find a barrel that will work with it with a 147gr bullet. The guy I spoke to was a total DB. I was shocked to the level of lack of proffesionalism on his part. If this is a representation of Smith and Wesson this will be the last S&W gun I will ever buy.
shipwreck2
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Barry1me,
I am looking for the exact same thing that you are. I have a 9mm core and I am looking for a new barrel to add a can and I would like to shoot a 147g bullet. I will let you know if I find one.
shipwreck2
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Barry1me,
I found this, I don't know if this helps, but it makes me think a 1-16 would do the trick:
Just because it's on the internet doesn't make it true.
S&W standard 9mm barrel twist rate was 1-18.75 or 1-16, (depending on who you talk to.) Five grove, cut rifling is still the standard I believe for all S&W barrels.
I understand on the post 2011 M&P barrels they've switched to a 1-24 to try and get better accuracy with 115-124 gr. bullets.
(longer bullets require faster twist's and will tumble in slow twist barrels. Shorter bullets don't seem to mind faster twists, so manufactures normally use a twist to stabilize the heaviest bullet their customer may use.)
Most firearm manufactures use the old Greenhill formula to determine twist rate. It's a mathematical formula taking into account the bore diameter, bullet length and velocity to come up with an "ideal" twist rate. You can use this formula for almost any caliber from 17 caliber to artillery and you'll find that whatever twist rate comes up, that's pretty close to what all the manufactures have been making for years.
Except 9mm Parabellum. Using this formula, the "ideal" twist rate for a 9mm with a 147 gr. bullet would be 1-22" yet manufactures can't agree on what's an ideal twist rate. Most American companies use a 1-16" but european companies use much faster twist rates. Glock, Sig and H&K use 1-9 to 1-10 and I'm told the original P-08 Lugers used a 1-7 twist.
Looking at aftermarket match barrels, we see there are basically two choices. 1-16" to stabilize even 160 grain lead bullets and 1-24" for folks building open class race guns that will only see 100-125 gr. bullets.
Jeff
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Last edited by fltbed; 01-24-2013 at 09:10 AM.
I found this, I don't know if this helps, but it makes me think a 1-16 would do the trick:
Just because it's on the internet doesn't make it true.
S&W standard 9mm barrel twist rate was 1-18.75 or 1-16, (depending on who you talk to.) Five grove, cut rifling is still the standard I believe for all S&W barrels.
I understand on the post 2011 M&P barrels they've switched to a 1-24 to try and get better accuracy with 115-124 gr. bullets.
(longer bullets require faster twist's and will tumble in slow twist barrels. Shorter bullets don't seem to mind faster twists, so manufactures normally use a twist to stabilize the heaviest bullet their customer may use.)
Most firearm manufactures use the old Greenhill formula to determine twist rate. It's a mathematical formula taking into account the bore diameter, bullet length and velocity to come up with an "ideal" twist rate. You can use this formula for almost any caliber from 17 caliber to artillery and you'll find that whatever twist rate comes up, that's pretty close to what all the manufactures have been making for years.
Except 9mm Parabellum. Using this formula, the "ideal" twist rate for a 9mm with a 147 gr. bullet would be 1-22" yet manufactures can't agree on what's an ideal twist rate. Most American companies use a 1-16" but european companies use much faster twist rates. Glock, Sig and H&K use 1-9 to 1-10 and I'm told the original P-08 Lugers used a 1-7 twist.
Looking at aftermarket match barrels, we see there are basically two choices. 1-16" to stabilize even 160 grain lead bullets and 1-24" for folks building open class race guns that will only see 100-125 gr. bullets.
Jeff
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Last edited by fltbed; 01-24-2013 at 09:10 AM.
Interestesting...KKM says there 1-20 twist barrel is the most accurate for 147gr bullets. After yesterdays discussion with Smith and Wesson I do not want to give anymore money to them. I will look into the KKM barrels.
keep me updated....my can will be here in next 30 days or so. I will probably order here shortly. I am leaning towards the KKM barrel.
KKM told me yesterday that they will only do a 1:20 twist for the M&P 9 threaded barrel.
Bkreutz
US Veteran
The internal rifling twist rate is different than the external threads that DanTana was talking about. Different suppressors (and compensators) are made with different thread pitches.
Don't get twist rate and threading confused. Threading is on the end of the barrel that your device will screw on to, mine is a 1/2" x 28 threads per inch. Twist rate rate is how many turns the bullet will spin in number of inches. 1:20 is one turn in 20 inches.
shipwreck2
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Interesting as I emailed them last night and the sent me this today:
"We use a 1-16 twist in the 9mm."
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