New wilson Muzzle Brake - Loss of accuracy

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[ARCHIVED THREAD] - New wilson Muzzle Brake - Loss of accuracy

Posted: 10/9/2003 7:58:52 AM EDT

I just had new Wilson muzzle brake threaded/blind pinned by professional gunsmith (sponsor on this board) on my 16" 1:9 twist AR15 carbine and now have seen a significant loss of accuracy, my groups are now three inches, where they were .75-inch at 100 yards. Has anybody experienced anyting like this after installing a muzzle brake?

I checked and:
1) the bullets are not skimming off the brake
2)the pin is not protruding into the barrel
3)the brake is straight.

I heard you could have a small loss of accuracy with a brake, but this amount is unacceptable...

Posted: 10/9/2003 8:33:50 AM EDT

[#1]

Hmmm...

I don't think I had any accuracy loss with my brake installed. (Wilson installed mine)

But I never really shot many groups for accuracy before putting the brake on.

I would call Wilson up and ask them.

Posted: 10/9/2003 9:22:09 AM EDT

[#2]

Your barrel doesn't like the extra weight in that exact location. Browning makes a brake which screws forward and backwards a little bit and that does amazing things to the group size. Looks like you drew the short straw.

It will be interesting to see what Wilson says.

Cheers!

Posted: 10/9/2003 11:21:25 AM EDT

[#3]

Did you have someone machine threads on your barrel? That could be what caused it if it was not threaded and was accurate before the threads were done.

Posted: 10/9/2003 11:57:38 AM EDT

[#4]

HIM, is probably correct. The brake has affected the barrel harmonics. Try some different loads and see if that makes a difference. Where as before it may have liked 55 gr bullets at 3200 fps it may now prefer something else at a different velocity but I am surprized it would increase group size by more than a inch at 100 yds. I have a wilson on my 16 BM and noticed no diff in group size.
Another thought, maybe you ran into a bad lot of ammo. So please try another brand/lot of ammo.

Posted: 10/9/2003 11:58:27 AM EDT

[#5]

Yes they threaded it, standard threads. But it is a 0.75 inch HBAR, you would think it would be able to handle that. I may try to change it out for one of Kurt's Faux flash hiders from KKF.

Posted: 10/9/2003 2:35:16 PM EDT

[#6]

Both AR's I had with Wilson brakes were VERY accurate. I had them both installed by Wilson. They didnt seem to hurt my accuracy at all.

Posted: 10/9/2003 5:47:02 PM EDT

[#7]

It was not installed by wilson, and on looking at the receipt, it was actually a Cav Comp, which looks like the wilson. It was installed by K2 sports. I will try all the your suggestions, and hope for the best. The only thing I have ever fired from the rifle is Lake City XM193 and Winchester 55gr white box.

Posted: 10/9/2003 8:29:52 PM EDT

[#8]

If they threaded your rifle look and see if they nicked your crown and wheher or not it has an angled crown now.

[ARCHIVED THREAD] - New wilson Muzzle Brake - Loss of accuracy

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