ORIGINAL: stubblejumper

It all depends on the chamber and die dimensions,the pressure that you load to,and the brass.It also depends if you neck size or full length size.If the chamber is on the large size,the brass will be worked more by the die,shortening it's life.If you load to higher pressures,brass life will be shorter.If the brass is soft,life will be shorter.If you neck size,brass life will usually be longer.I usually get 8 to 10 loadings out of my 22-250,yet only about 6 loadings out of my 300ultramag and 7mmstw brass.I usually trim after the first firing,then after every two or three firings.