I’d be even more surprised if the issue were a 1/7 or 1/9 barrel not stabilizing 55gr. I’d buy it if it were a 1/7 shooting 40gr, or a 1/12 shooting 77gr. But any 1/7 or 1/9 that can’t stabilize 55gr to remotely within 6 MOA, even with the trashiest of ammo, isn’t a barrel twist problem, it’s a fucked up barrel problem. I really don’t think it’s the issue at play here.

As long as we are all playing the guessing game, I’m going to go with shooter ability. That’s obviously not a knock on OP. Have a known quantity shooter shoot the rifle. Even Tula should group <4 MOA. If that’s not it, I’d go with something interfacing with the optic/mount being loose.

Firearms work in measurable and predictable ways following the laws of physics.

Your statement is objectively incorrect.

Don’t know what else to tell you.

Hey-
Just wanted to close the loop here.  The problem was me, not your product.  I went through and rechecked my mount like you suggested and found that I had not tightened it sufficiently to the top rail.  The result was the scope was cocked slightly to the side at the rear end.  It was tight enough to hold it's position, but not enough to pull it into alignment with the barrel.  I tightened everything up and now the gun consistently shoots good groups.  Thanks again for the good advice, and thanks again for standing behind your product.  

v/r