I'm new to long range shooting and new to reloading. I'm shooting a Ruger 300 Win Mag. How many shots should I expect my Brass to last? Obviously I know to always inspect as things can happen and it could be junk after one firing. But generally, how many times can brass be fired and still be good? i'll be loading some once fired Winchester brass, the silver brass used in the Winchester Supreme Ballistic Silver Tips. Thanks for the help!