If everything goes smoothly, it looks like I'm getting new rifle chambered in 260 Remington. Previously I asked about converting 308 cases to 260, so I have few of them prepared. Now I have to make some loads, so I got 140 gr Nosler Custom Competition bullets 0.529 BC, 0.287 SD ,1.307 OAL, they are not like Berger, but for break-in and fire-forming brass they should work fine. From powders I have, RL-15, RL-17, RL-22, and Varget also I got some Trail Boss which I think I can use to fire-form brass without using any bullets. I have Lee Reloading book it looks like RL-22 would perform the best, but this book has nothing for RL-17, which I've heard is more superior. So does anyone have a good stable load using RL-17? Alliant website recommends 41gr which would push 2,645 fps. Thanx.