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Old 04-19-2018, 08:55 PM
acarste acarste is offline
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having an issue with my SW MP 45acp 2.0, shooting cast lead 230 round nose, occasionally a round will jam, failure to feed, the round is jamming on the top of the barrel shroud/chamber, I understand that the round will hit the top part of the shroud/barrel hood before it straightened out to slide into the chamber, my question is what should I do about it? am going to "smooth out " the sharp edges of the shroud. ammo clocks at 865 fps,
do I need a different strength recoil spring? appreciate the help in advance


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Old 04-19-2018, 09:10 PM
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Are these home loads if so?

I would try different Over all length.

Sounds like too Long.
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Old 04-19-2018, 09:22 PM
acarste acarste is offline
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round is good
perfect fit in my Wilson case gauge

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Old 04-19-2018, 10:26 PM
Mike, SC Hunter Mike, SC Hunter is online now
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Adjust your cartridge length as OU 812 suggest.
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Old 04-19-2018, 10:30 PM
crankyoldlady crankyoldlady is offline
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Have you done a "plunk" test in your pistol's barrel?
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Old 04-19-2018, 10:47 PM
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Is the problem only with that particular ammo/load or have you tried other rounds or brands?
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Old 04-20-2018, 05:40 PM
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Quote:
Originally Posted by acarste View Post
round is good
perfect fit in my Wilson case gauge

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Ah yes, but did S&W use that gauge when building your gun?
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Old 04-21-2018, 05:00 PM
acarste acarste is offline
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I think problem solved. ran about 250 rounds thru the gun after "smoothing out" the sharp edges of the shroud
not one problem at all
didn't take off a lot of material just polished the edges
take a look

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Old 04-21-2018, 06:10 PM
acarste acarste is offline
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looks kinda rough up close but it ran like a champ!

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Old 04-21-2018, 06:13 PM
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Quote:
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round is good
perfect fit in my Wilson case gauge

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Noooooooo. you use your pistols barrel if you want a more accurate way of knowing if the rounds properly fit the chamber.
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Old 04-21-2018, 09:16 PM
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my understanding is that the case gage is the ultimate standard for size, was always told if it fits in the gage it will fit any chamber

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Old 04-21-2018, 09:32 PM
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Nope, not always true. The "plunk" test is the ultimate test and is barrel specific to each firearm.
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Old 04-22-2018, 09:42 AM
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went thru a couple hundred rounds yesterday they all fit
like I said no problem with the ammo. believe it was the sharp edges of the shroud
had no problem with the ammo after I smoothed that out

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Old 04-28-2018, 09:33 PM
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went another 150 rounds today practicing the classifer for IDPA , not one hiccup from the ammo, no hang ups at all, I consider the problem solved. appreciate all the help and input

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Old 04-29-2018, 11:21 AM
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Are these your reloads you're using?
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Old 04-29-2018, 04:50 PM
crankyoldlady crankyoldlady is offline
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For the benefit of individuals who may, in the future, find and read this thread...

...it is ALWAYS BEST to adjust hand loads to properly fit the barrel. Modifying the barrel hood to fit the hand load is ill advised.
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Old 04-30-2018, 07:52 AM
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the handloads do fit the barrel, did the "plunk" test and the case gage, the problem was the sharp edges of the shroud
anyway it's done.

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Old 04-30-2018, 08:36 AM
CBStuard CBStuard is offline
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Quote:
Originally Posted by crankyoldlady View Post
For the benefit of individuals who may, in the future, find and read this thread...

...it is ALWAYS BEST to adjust hand loads to properly fit the barrel. Modifying the barrel hood to fit the hand load is ill advised.
I disagree. Rounding off sharp edges has nothing to do w/ how the round fits the chamber. But it will have a lot to do w/ how the round slides into the chamber at a slight angle.
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Old 05-01-2018, 06:57 AM
acarste acarste is offline
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I disagree. Rounding off sharp edges has nothing to do w/ how the round fits the chamber. But it will have a lot to do w/ how the round slides into the chamber at a slight angle.
thanks for the confirmation!!

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Old 05-07-2018, 03:18 PM
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Quote:
Originally Posted by acarste View Post
I think problem solved. ran about 250 rounds thru the gun after "smoothing out" the sharp edges of the shroud
not one problem at all
didn't take off a lot of material just polished the edges
take a look

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Hello, I'm new around here, and after read your issue, I have decide to offer my two cents to help... well it's hard to explain this issue, because not all the M&P need what i'm about to explain but here i go...

The M&P have an inaccurate design of the ramp feed of the barrel, but thanks to the new magazine springs and the thight fit of the gun when is new, the problem is not noticiable because prevent the FTF and Misfeeds, but after some use and i mean several thousands of ammo, the problem reveals it self... and that's what i suppose is happening to your pistol...

Now comes the cuestion What to do...?

The solution is fair and simple take the pistol to a Gun mastersmith and request him to change the angle of the ramp until the feed action becomes nice clean and smooth in every angle...

Or buy and aftermarket barrel with a longer ramp feed i can suggest a brand : Silencerco...

Remeber the all M&P original barrels have the same ramp issue, so getting another of the same is not the solution.

I'll share you a photo of what i'm talking about...

images — imgbb.com
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  #21  
Old 05-07-2018, 03:28 PM
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Dremel tool?

Quote:
Originally Posted by acarste View Post
I think problem solved. ran about 250 rounds thru the gun after "smoothing out" the sharp edges of the shroud
not one problem at all
didn't take off a lot of material just polished the edges
take a look

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Old 05-08-2018, 11:48 PM
acarste acarste is offline
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Sheesh! where did all the "expert 2nd guessers" come from? almost 700 rounds strong hand and weak hand training no problems whatsoever problem is solved learn from it and move on people

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Old 05-09-2018, 01:37 PM
M&P 40 M&P 40 is offline
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Quote:
Originally Posted by acarste View Post
Sheesh! where did all the "expert 2nd guessers" come from? almost 700 rounds strong hand and weak hand training no problems whatsoever problem is solved learn from it and move on people

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What ever you said buddy, you have the right to have an opinion...

But things are more complex than what you think.

"Rounding off sharp edges" is the easy way to solve a fedding isuue, and it works for some because most of the FMJ ammo on .45 ACP are round bullets, try with JHP with a flat nose... or lead bullets... and then we can have a real discution...

Let me remind you about the national isuue of the on 2008. THE M&P 40, were remove from most security agencies that have been provide with it, because they request a devolution of all the guns under the motive of "reliability issues" because .40 S&W caliber ammo in it original design have a flat nose bullet... And that make the M&P 40 Prone to FTF...

This is not about being an expert, this is about sharing knowledge and information...
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Old 05-09-2018, 04:04 PM
acarste acarste is offline
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a "real discution"?
.......the last 800 rounds have been lead cast bullets both the round nose and the rounded flat nose, they all work great. btw, it's 2018 right now

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