the 45 raptor is a straight wall rifle cartridge that mimics the size of the .460 s&w magnum. unlike the .460 s&w magnum, the 45 raptor has a rimless design that improves its ability to feed in semi-automatic firearms. the rim matches the specifications of a .308 winchester cartridge. the first 2000 pieces of cartridge brass were processed (skived extractor rim) at satern rifle barrel co. this can be verified by the .460 s&w head bunting mark on the cartridge case. barrels also came from satern rifle barrel co. in the 5r 1-20 twist rate