Actually you can fire those Magnums until your hand loses all feeling. BTW, unless you've played Pro Baseball as a catcher that may not take as long as you think. The model 19 is rather light for the 357 Magnum and a bit punishing to shoot in quantity. There is reason why most shoot 38 spl. in the model 19 and about 100 rounds of 357 Magnum will probably have you understanding that.