Crazy 303 brit question

[JReed]

So out of curiosity I am thinking of loading 303brit with BP. The thing I am running into is a suitable bullet mold. They are all designed for a gas check and I am having a hard time finding a plain base design. I am looking for a 215gr bullet if I can but a 190 would work. I think this would be fun with as much 3F as I can get to fit in the case would for sure get some attention at the range . My groove dia is 314 bore is 303 two grove 1/10 I am not opposed to paper patching if that is what it takes.

Any thoughts from the group?