Question about barrel swap

[JTB]

[JTB]

I will add that I was shooting with a bird cage on and now in just using a thread protector. Could that have changed anything?

[A5BLASTER]

Just swapping the barrel could account for that. Diffrent barrel with a diffrent degree of forces acting on the bullet.

The muzzle device change can effect point of impact as well.

I wouldn't worrie about it. Just shoot it and enjoy it and wait to clean the barrel till you have 200 to 300 rounds down pipe, then clean it real good and go do a nice slow firw, cold bore sight in.

[Klem]

JTB,

That is a big change on the target. Lots of things can account for a change between barrels but for such a large change it's probably down to the direction of the barrel relative to the shoulder on the barrel extension. Unfortunately you can't spin that barrel 180degrees and fire some more groups to see how big, if any, an angle exists between the barrel and line of sight.

I say "if any" because it may not be a fault of the new barrel. Your previous barrel might have the angle, and printing 10" low is where it should be.

I agree with A5, I wouldn't worry about it unless things go wrong down range.

[JTB]

[JTB]

That 1.25 was with factory hornady black ammo but that ammo was 3/4 for most 5 shot groups.

[FLshooter]

[SDW]

My point of impact dropped 5" on the same barrel (a 5.56 upper) just by swapping from a brake to a thread protector. I could certainly understand a change when swapping barrels. Different harmonics.

[JTB]

My point of impact dropped 5" on the same barrel (a 5.56 upper) just by swapping from a brake to a thread protector. I could certainly understand a change when swapping barrels. Different harmonics.