Mine at 50 yards does 1/2” - 3/4” using 18 grain JSBs. Is is set up to shoot 3 times starting at 2600 psi. After thoughts 3 shots I pump it back up to 2600 psi and shoot 3 more. I am basically being the regulator this way. Very happy with the gun. I have had quite a few groups well under an 1” at 80 yards this way.