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Hmm, thats not good, better give S&W a call and see if you can get that looked at.
 

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Yeah, very comon problem.



If your replacement sight isnt any thicker, try dimpling the bottom [of the sight] with a center punch - which will raise up some of the metal.



Also, some are using locktite.
 

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Is any one else having trouble with ammo? I think my M&P might be over rotating 180 gr bullets. Some leave odd shaped holes in the targets, as if the copper coating is comming off before impact. Its happened with a couple diffrent Mfg. but never happened with 165 gr. or 135 gr.
 

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I just use 155 rainer plated and they shoot fine in my reloads
 

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Ken,

It is one of the following:

1. The twist rate is not enough to stabilize the longer bullet. I haven't really noticed this with mine and I shoot 180s and 200. Admittedly I haven't shot a lot of paper mostly steel. It may just be that you load needs tweaked a little or it may just be an incompatibility.



2. I have heard some glocks having this issue with some bullet manufactures but not with others of the same weight and profile. So you may just need to switch brands. I have been using mostly 200 gr precision bullets with good results.



3. a nick on you muzzle crown. really not likely but it could happen. Just examine your barrel carefully and see if you can see any burrs.



Hope this helps,

Dan
 

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KEN N said:
Is any one else having trouble with ammo? I think my M&P might be over rotating 180 gr bullets. Some leave odd shaped holes in the targets, as if the copper coating is comming off before impact. Its happened with a couple diffrent Mfg. but never happened with 165 gr. or 135 gr.


If you are seeing lead spirals/pinwheels coming out from the bullet hole center, it usually means you are shooting plated lead bullets with too much crimp. Some people also just seem to experience this with a given barrel with any plated bullets. Some have suggested it has to do with how agressive the lands and grooves of the rifiling are.



I've experienced such shooting 230gr rainiers out of a 1911. Rifiling wasn't that deep, and it mostly went away after I adjusted my belling and crimp. Still got the occasional one due to me not putting the bullet in the case mouth straight enough and a little plating getting shaved off upon seating. Too much crimp cause accuracy problems. Teh minor shaving didn't seem to be too problematinc, just made for odd looking targets.
 

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my first mystake was buying A-MERC. they said there was a problem with the electro plating. They replaced them (even payed for shipping) but the next batch did the same thing. the only good thing I got from shooting their bullets was a double bullseye with one shot.(one hole from the bullet and one from the copper. :wink: They then replaced the 180 gr 3c bullets with 135 gr jacketed Triton Quick-Shock, but I haven't had a chance to shoot them yet. But it also happened with CCI brass 180 gr.
 

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hmm, I might have to go out and shoot some paper to see what I'm getting.

Only shot paper once and that was for sighters.
 

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After 700 rounds with no malfunction, I noticed my front sight is a little loose. If I push real hard with my thumb, the front will move. I'll try the loctite fix.
 

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Front sight loose again... Loctite was applied. Fast, hard shooting class caused to to loosen. Front dovetail cut is larger than my buddy's M&P40s. Requesting new slide.
 

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Well, as a data point I can add that one of the guys I shoot with gets reloads mad eup with plated bullets. The bullets seem plenty accurate, but he is getting pinwheels. I usually find this means that the rifling is gouging the plating a bit much. I find that if it is a matter of too much crimp, you not only get pinwheels, but accuracy goes south to boot.
 
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