I've got a brand new Seekins SP10 in 6.5CM that I'll be using for PRS Gas Gun matches. Been shooting the caliber for years with my bolt gun (and loading my own) but not interested in loading for the gas gun. So I'm looking for experiences from people who have SP10s and who tested different kinds of factory ammo. What worked well, and what didn't? Doing ammo testing in a few weeks..... Thanks!