[GARRARD]

What grain of ammo and what twist rate?

 

[TRAILBLAZER]

62 gr and a 1 in 9 twist rate. Federal nato ammo 2003, IMI NATO 2009 AMMO

 

[ArmyCPT]

Sounds like the standard Bushmaster over-torqued barrel. This is a common problem with Bushmaster rifles.

End result - your front sight base is now canted to the side. If the rifle's still in warranty, contact them and make arrangements to send it back.

If not, see if there's someone familiar with fixing AR's in your area and have them properly set up your barrel.

HTH.

 

[Hgunner]

Sounds like the standard Bushmaster over-torqued barrel. This is a common problem with Bushmaster rifles.

End result - your front sight base is now canted to the side. If the rifle's still in warranty, contact them and make arrangements to send it back.

If not, see if there's someone familiar with fixing AR's in your area and have them properly set up your barrel.

HTH.

This and even if it is out of warranty make them stand behind it and fix it.

 

[82nd ABN]

I take it this rifle has an A2 front sight base. How is it mounted? Is it pinned? Or does BM use set screws that allows you to adjust it? The groups could be a number of things, over torqued barrel nut possibly or just the grade of the barrel. These companies are not paying a lot for there barrels. I am not saying they are no good I am saying I have seen barrels that have had poor machining and given similar results on a garand. In order to get the bullets to center you need to move the front sight over to the left. In other words, if your rear sight is to the left, follow with the front in order to get the rear to the right. I am talking a real real small amount. That does not help you with the groups though.
Did you try shooting the rifle???

 

[TRAILBLAZER]

Its only a few months old, and would this cause it to print all over the target.
If its just a matter of looseing the barrel nut and torquing it back to spec. would it be better to have a gunsmith do it. Cheaper than UPS back to Bushmaster or am I wrong. What do you guys think?

 

[TRAILBLAZER]

Yes its a A2 front sight and its pinned. I shot a few shots thru it and have same results. It has one of thier chrome lined penncil barrels on it

 

[GARRARD]

Its only a few months old, and would this cause it to print all over the target.
If its just a matter of looseing the barrel nut and torquing it back to spec. would it be better to have a gunsmith do it. Cheaper than UPS back to Bushmaster or am I wrong. What do you guys think?

Depends on their warranty program. If they will pay for shipping both ways, use the warranty.

 

[CHARLIED308]

I have corrected the index on more than a few Bushmaster rifles with this problem over the years. Usually the rifles shoot too far to the right with the windage adjusted all the way to the left. The people at Bushmaster have told me that 13 clicks of windage from center to sight a rifle is acceptable. I don't agree with them. The barrel index issue will not cause large groups, they will just be too far left or right. I have a lightweight 1:9 chromed lined barrel on one of my carbines and it prints 3" at 100 yards with 55g M193 ammunition without the use of a sling. If your rifle will not shoot 4" or less using the small rear sight aperture, there could be something wrong with the barrel.

Any mass produced rifle could have a one in a million bad barrel right off the assembly line. If you suspect the barrel is bad. Send it back and get Bushmaster to correct the problem under warranty. If they will not honor the warranty, find a good AR gunsmith and have them correct the problem. I would not pay Bushmaster to correct any problems.