I also believe there is nothing to gain with .460 over regular .45 ACP brass. If memory serves me, the bullet is seated to the same OAL as ACP. The longer brass is just to keep the .460 out of your pappys old 1911 .45, sort of like the .357 is longer than the .38. You could seat the bullet out further for more case capacity, but that is uncharted waters and potentially exceeding the 625's pressure limits IMO. Starline has claimed to do some different heat treating and such to the brass to make it stronger, but I'm not buying it. Especially in a fully supported 625 chamber.