FS, I have a friend who shoots a Marlin .45-70 with paper patched CUP base 510 swaged bullets with rather astounding accuracy. He uses Reloader 7 and gets 1800 fps at the muzzle.
The question I put to you is in regards to your description of your bullet as being a hollow base design. If that is correct I seriously doubt you will generate suitable velocity with smokeless powder due to the likelihood of a blown skirt. Doesn't mean you can't shoot them well, but based on my experience with cupped base an hollow base bullets I'm not thinking you will get much beyond 1,000-1,100 fps if that.
