In my Rem 700 Varmiter, I use Federal Brass with a Federal Large rifle Match primer. Relaoder 15 is hard to beat in the swift. For 50 grn pills I use 40 grn even of Reloader 15. With 55 grn pills, I use 40 grn even of Reloader 15. The rifle just liked that charge. /ubbthreads/images/graemlins/smile.gif These are TOP loads, so you might want to back off a few grains and work up from there.
The cart overall length is 2.770 in my rifle. This puts the bullets just slightly off the lands. Hope this helps. Good luck!