I have used plain base gas checks on my hand gun cartridges and my 45-70 Winchester 1885 with excellent results. I own several Mannlicher-Schoenauer rifles in 6.5mm, 8mm, and 9mm. Since I have a large supply of jacketed bullets for these rifles, I have not cast for them. I hope to be purchasing a 9.5mm in the near future and I thought that it would be fun to shoot cast boolits in it. Would plain base GC work at velocities around 2000 fps? If so, does anybody know of a source for .375 plain base GC? I haven't been able find any to purchase.