How does the trigger feel? Is it excessively heavy or have a glitch in it? Often a "duty tune" trigger job can solve a lot of accuracy issues. I have 2" mod 36, mod 60, and mod 940, and all will shoot into about 2" at 10 yards. I would also check the muzzle for unevenness.

__________________
H Richard
SWCA1967 SWHF244