My Callahan works as well as my GreTan and seems to produce slightly faster lock time.....
Two of the three Callahans I've installed on M700's have either galled on the cocking ramp or created a bodacious notch in the trigger. Some judicious filing and polishing fixed the galling issue, no amount of adjusting or swapping known triggers fixed the notch issue. That rifle has a Pierce FP assembly now........
Gre-Tan and Pierce are excellent. Have no experience with the PT&G yet.
Casey
