I'm thinking of selling

[LASigmon]

With the decrease in accuracy and having some ftf's I'm thinking about selling my M&P 10.
I'm not sure what is going on but I haven't changed anything. I'll clean it real good again and take it to the range one more time to see if it was a freak thing but if it still won't shoot right it's going to be history.
I hope maybe there was some dirt or something that caused it because I like this rifle.
So I ask, (yes I realize what forum I'm on lol), have any of you had any experience with a Windham Weaponry SRC 308? They have gotten good reviews and I have their SRC 223 and really like it.

 

[rojodiablo]

Decrease in accuracy??

What is the round count?

If it is less than 8,000 with factory (Non hot rodded) ammo, and unless you went on a 500 round mag-dump spree, then the issue is something completely removed from the barrel itself.

FTF are an issue with many 308AR's. Plain and simple; they have a deserved reputation. And; this is the M&P's Achilles heel. But that does not screw up accuracy.

Barrel nut tight? Scope mounts still tight? Scope rated for magnum power levels? 308AR's jar back and forth, and are much harder on optics than a 30-06 bolt rifle. Believe it or not, this is the truth. Many lesser scopes won't hold zero well under these rifles.

As to the Windham rifles....... I have 2 BM308's, which were built by Windham before BM was sold and they changed their name.
YES..... they are better rifles than the M&P10. But that's not to say the S&W is not a good rifle. It can be.

 

[LASigmon]

I checked the barrel nut, the scope is a Trijicon Accupoint 5x20x50 mounted with a Larue qd mount. I am using the same ammo and have about 700 rounds through it.

 

[diyj98]

With only 700 rounds, I can't see it being "shot out". Assuming you had acceptable accuracy before, there's something else going on. Something loose, scope broke, etc? I recently had a rifle go wild in the accuracy dept. just to find out a $600 scope had something break inside it.

 

[Fourth Horseman]

Agreed. It sure sounds like a problem with the scope. I'd definitely start there with troubleshooting. LASignmon, have you tried taking the scope off and shooting the rifle with just iron sights? I think that's worth your time to test out. If it holds reasonable groups with irons then you have your answer.

 

[Joey1911]

Mine is spot on. I've only owned it for 2 years and probably........1,500 rounds mostly federal XM80CL. No accuracy issues at all. I love this frigging rifle! I just left my range. Using iron sights at 50 yards is spot on then I put my scope back on ( quick detach setup) and it held zero... I couldn't be happier with this rifle.

 

[LASigmon]

The scope is the next thing I'll check. I'm going to put my ACOG back on my M&P and put the Accupoint on my ar15 to see if it's the Accupoint causing the problem.
I really do hope it is the scope.

 

[Fourth Horseman]

The scope is the next thing I'll check. I'm going to put my ACOG back on my M&P and put the Accupoint on my ar15 to see if it's the Accupoint causing the problem.
I really do hope it is the scope.

Sounds like a good plan! Please let us know how it turns out.

 

[CVF]

Are you sticking to the same ammo or switching it up with whatever you can find?

After trying all sorts of ammo to see what mine liked best(including a bunch of Match ammo) it turns out mine loves the cheap 145gr Prvi.

 

[rojodiablo]

The scope is the next thing I'll check. I'm going to put my ACOG back on my M&P and put the Accupoint on my ar15 to see if it's the Accupoint causing the problem.
I really do hope it is the scope.

Even the best optics can have issues. The good news is, their service tends to be top notch. It's part of what you pay for when you buy more expensive optics.

I agree with the post suggesting running the BUIS and seeing where it is at, to eliminate some potential issues.

 

[LASigmon]

I'm sticking with the same ammo. It's what I have been using from day one. It used to hold 2" groups at 100 yds. The more I think about it the more I think it is the scope. I'm going to the range tomorrow to see. Unfortunately I don't have any BUIS but I should be fine with the ACOG. I know it's okay.
I'll post a report tomorrow night.

 

[LASigmon]

Here are my conclusions from today. First off, I'm not the best shot but I knew that . Other than that all I can figure is my gun likes to be clean, more so than my other guns. I also tightened up the screws on the Larue mount for the Accupoint. I don't know if they were loose enough to make a difference but it held a tighter pattern today. One thing I really noticed is I need a better trigger and that goes for both guns. Both guns shot about the same at 50 yds with either scope. The widest group was 2" if you discount the flyers. I had some keyholes with both guns. So I guess my next move is new triggers for both rifles. Overall I'm happy with today's results so the M&P is staying at home .
On a side note, today was a good day for my Glock 42 also. It is now broken in and shooting without issue.

 

[Fourth Horseman]

I'm glad to hear that your M&P is staying with you. I'm curious about the keyholes, though. Are rounds tumbling and going through sideways? I wouldn't think that's possible at 50 yards.

 

[copemech]

Even though I have had issues with mine, I am still All IN! We shall see.

I do not have any unrealistic expectations, possibly I will be even better off?

In my mind, this is still a carbine FFS! I mean, I would expect about 1.5 MOA out of a decent stock AR! Everything is bigger on a .308 by a margin, and for a short 18 factory barrel what can one reasonably expect?

My goal from the onset has been to get a longer range unit that will do 6" group at 300 if shooter is up to it. I think I can!

Scattered groups regardless of ammo, unexplained fliers? The loose barrel nut I found may explain a lot, who knows?

It all changed today with the install of the MI freefloat tube, nice unit! And as things would have it, I dislocated a rib last week and it hurts to even breath! Shooting this thing is out for now, too hot here anyway, so the testing will proceed later, on this and a couple other project units.

TRIGGERS? How does one expect to hit with a stock trigger? They totally suck! Yes, I have been spoiled, but I will tell you it does not take a lot of money to send the group off to Bill Springfield for a #3 job. Forty or fifty bucks and you are in a different world. Save the big bucks for later on the "G" trigger. You will spend a lot on ammo before you wear out the converted stock unit!

 

[LASigmon]

I'm glad to hear that your M&P is staying with you. I'm curious about the keyholes, though. Are rounds tumbling and going through sideways? I wouldn't think that's possible at 50 yards.

I'm sorry. By keyholes I meant two shots one on top of the other that looked like a keyhole. I need to get my terminology right.
I guess I should have said two shots, one hole. I also had 3 shots that almost made one hole.

 

[rojodiablo]

I'm sorry. By keyholes I meant two shots one on top of the other that looked like a keyhole. I need to get my terminology right.
I guess I should have said two shots, one hole. I also had 3 shots that almost made one hole.

If it shoots like that.......

DO NOT CHANGE A THING.

 

[Fourth Horseman]

I'm sorry. By keyholes I meant two shots one on top of the other that looked like a keyhole. I need to get my terminology right.
I guess I should have said two shots, one hole. I also had 3 shots that almost made one hole.

Awesome! Sounds to me like it's just a matter of trying some different ammo to see what your rifle likes best and of course plenty of trigger time!

Thanks for the follow up!

 

[CVF]

Glad to hear it's been sorted out.

As for the screws, loctite those SOBs down.

 

[MistWolf]

...I will tell you it does not take a lot of money to send the group off to Bill Springfield for a #3 job...You will spend a lot on ammo before you wear out the converted stock unit!

NOT this. Bill does a good job smoothing out triggers but cannot guarantee he won't cut through the case hardening. If the case hardening is removed, it won't be long before the trigger starts to double & triple

 

[LASigmon]

I believe I have decided to get a Geissele SSAE trigger. I'm probably going to order it this week or next.