I use a TC Encore pistol in .300 win. mag with an 18 1/2 inch barrel. I have been using Federal High Energy in 200gr. Nosler Partition. It performs well on game. I'd like to try other ammo to see if my gun likes it better for a tighter group. I don't hand load so I'm looking at factory ammo. I use the gun on big game and would like to stay with heavier grain bullets. Anybody else have a similar set up? Suggestions on ammo?