Have you tried a lighter spring in the factory trigger? The tuned up factory triggers can be very good. Mine is at about 10 oz and breaks like glass.I’m thinking of upgrading the trigger in my CZ 457. Has anyone tried the Jard trigger as well as the Timney? Pros and Cons/Comparison between the two.
I was hesitant because Timney advertises a minimum pull weight of 1#, but I've been able to safely adjusted mine significantly lower than that.