ULUL Stainless/Portless 6x45 16" AR15 Barrel Group Buy NOW CLOSED

[Taudisio]

I already had them loaded from when I was trying different things to get the first barrel to shoot. I windowed a duramag and grooved the lower to get to 2.400” max. I fully understand that different jumps won’t make massive differences, that is what has me a little worried about this second barrel. I have never had a rifle shoot 4” groups, not even during break in. If I can not get below 1.5moa, this thing is useless to me. The Shaw 223 barrel was easily 1moa with the 77 tmk, out of the box.

I understand now. Yea, if a barrel doesn’t shoot, it doesn’t shoot. 4” groups though….. have you checked the assembly and re-checked it?

 

[Jesseb]

With the last barrel, yes. Swapped to a known good scope and mount straight off my 6 arc (Trijicon accupoint) that shoots consistently 1moa. Same assembly with the Shaw 223 barrel shoots consistently 1moa. I will try a few more loads to see if I can get this thing to shoot then swap the Shaw back in there and see if it repeats.

 

[Thegman]

The Shaw 223 barrel was easily 1moa with the 77 tmk, out of the box.

That at least rules out your ability to shoot the rifle. Thanks for laying some groundwork. Like @Taudisio said, if you find a load that works well in your barrel there's a good chance it will work in others.

OTOH, the last batch seemed to be all over the place. Mine didn't shoot nearly as bad as others, but the chamber was -way- oversized.

 

[KyleR1985]

. New barrel was hitting about 18” higher than the original.

I’ve had 4 different barrels on the same upper/optic, 3 different calibers. All had point of impact within an inch or so of the first.

Is it normal to spin on a new AR barrel to an existing upper/optic and have the POI shift that much?

Still haven’t shot my barrel and it may be shit. But That’s the first place I’m looking.

 

[Thegman]

I’ve had 4 different barrels on the same upper/optic, 3 different calibers. All had point of impact within an inch or so of the first.

Is it normal to spin on a new AR barrel to an existing upper/optic and have the POI shift that much?

Still haven’t shot my barrel and it may be shit. But That’s the first place I’m looking.

18" seems to be a lot, definitely on the high end, but 4 all within an inch is probably just as unusual.

 

[KyleR1985]

18" seems to be a lot, definitely on the high end, but 4 all within an inch is probably just as unusual.

Inch or two* sorry typed fast.

None over 2” off in any direction for sure.