It does okay at 100 yards with Winchester white box 7.62x51 147Gr FMJ. I can get a group between 1 1/4" and 1 1/2". Not the greatest but not bad for the ammo. I used the Winchester stuff for break in. I haven't played with it to figure out what it likes the best. I do know what it does NOT like though. I shoot Norma TAC 150Gr FMJ in my Savage Model 12 that is capable of cloverleaf groups at 100 yards ( when I have a very good day). The PA10 absolutely hates the Norma TAC 150Gr, groups almost looked like a buckshot pattern at 100 yards. I really need to try some premium ammo in the PA10 to see what it is capable of. I have to wait until my shoulder gets better before I shoot first.
