I lucked onto a nice 6.8 barrel and had the rest of the gun in parts, so I put the thing together. Now I need to put together some ammo. I understand there is large rifle and small rifle primer brass. My question is which primer size brass is best...small primer or large??? I am going to guess and say small but not sure. What size primers does the military use??? Does the small primer brass have a small flash hole {like PPC stuff}???? And if so, does that make it more accurate/desirable {again, like PPC stuff}??? Thanks in advance for any info and if you have some brass/bullets you want to get rid of please let me know.