What is the difference between .357 and .40

22 thg 1, What is the difference between Sig and magnum? Is Sig dead? Is SIG good What has more stopping power 40 Cal or sig? 19 thg 7, SIG is loaded to higher pressure (40, psi) than the SW (35,), so it might not be suitable for allcaliber pistols. Check with. Magnum revolver. If the cartridge is not held by the extractor, the chances for a ruptured primer are great. Smith Wesson does make a.