Not to interrupt or anything but I'm wanting to build a rifle as well in either a 7saum, 7ss, 6.5prc. Not sure which route I want to go as I have checked the WWW to see how easy it would be to find brass for things. I don't reload just yet but that's on the list of things needed. I know the 6.5 prc would be easiest but I really want more authority on game and steel at the long end, that round is last on my list for that reason and I haven't read enough on it. As for the 7saum, that brass is sold out everywhere and seems to be non existent. The 7ss, will the brass be around long enough and will anyone that does remage prefit barrels be able to chamber this caliber for me. The reason I want a prefit barrel for a Remington is so I don't have to wait and pay for a smith, and if I get a long action I can always change calibers down the road when ever I want to what ever I want. I don't think I will ever buy another factory rifle because I can't buy exactly what I want! Wish some calibers would die out and some that have make a come back. What do you all think?