It depends on how retarded you go with said springs. With my shadow 1 custom target, with the CZ custom tuning job, that gun lights off everything. If it doesn't, you went "too far" or didnt put in an extended firing pin or something like that.I wouldn’t worry about breach erosion. However if you have a tuned CZ like many of us (ie lighter springs) you may run into light strikes with small rifle primers. That would be the only concern I’d have.