Ok, so I have a pile of parts to build a couple rifles out of and am undecided on calibers. I know for sure that I want to shoot heavy high BC bullets and in 6mm, 6.5mm, 7mm. Here is a list of my parts so far: 2 RSR repeaters with .308 boltfaces, 3 bartlein 5R barrels 7mm 1-9. 6.5mm 1-8.5, 6mm...