Once you look at the details of the 30 Super objectively, you'll find it has great merit. Just not much acceptance by other gun vendors. I had a custom 327 magnum revolver made up and that cartridge is awesome - this coming from a 10mm/375 H&H fan. Market friction is the only thing holding back the 30 Super. It's taken 40 years for the 10mm to finally get some traction. The 5.7 is about 35 y/o and just getting more traction. The guns have to come first.