I'm wanting to start casting bullet for my mosin nagant. The bore measures .3135 so I figure that I will use molds for a 303 (312-313). Hers's my question, what do you use for gas checks? I'm between 308 and 35. I haven't seen 32 caliber gas checks. This has got to be the same problem with 8mm, 303, etc. How do you guys handle this? Thanks
Siamese4570