I toss them after the second loading. I load them max+ with 200 grain Accubonds and if you try to load them a third time the primer pockets are to loose. I did stock up on bulk brass a few years ago when it was cheap. You should be fine using the Boss
I load them and also 338 LM on a standard Rock Chucker, as far as brass life my 300 rum is on the 4th loading but I am not at max 208 gr. A max;s at 3000 fps