It depends how much you want to spend and how much work you want to do. I use range brass .223, free, more work. I lube the necks, inside, with mica or neck lube then run it through the fl size die. I only set the die down far enough to drop the case in and have it absolutely flush with the barrel. Take out the extractor or use a nail set to hold it down. The prime charge and seat. Try to seat the bullet a could thou off the lands. The gun should sound the same closing empty or with a loaded round. Use close to max for fireform load. I use whatever is cheapest at the time. It will take 110-168 gr with problem. But I shoot the 168 in my 14 not a 10. 120s are supposed to work good. Email with questions Dan