I'm getting mildly concerned with my new Predator Hunter in .223
After the barrel break in routine with Winchester 55gr FMJ, I've tried Federal Premium 55gr BTHP (Sierra),
and Hornady 55gr V-Max. The best group I can get is 1.25". That's really disturbing to me.
I can't reload yet, but quality factory ammo should shoot MOA.

Speaking of reloading, has anyone measured their chambers? What OAL are you using?