So I came across this cartridge the other night while up way too late, its floating around a few forums and Pacific Tool and Guage has a reamer for it. For those of you who have not heard about this cartridge. .30 Major is 6.5 Grendel necked up to 30 caliber. It has slightly better case capacity and ballistics than 7.62x39 but it is based on the same case. There are similar wildcats and AI rounds that all look very similar and I have heard that you can fire normal x39 in the chamber of the 30 Major? Has anyone played with this or similar conversions. It should be able to be hand reamed with a pull reamer.