These are 250 grain .44 Caliber SWC/Keith style bullets--the 244 has a GC base. I have both but seldom used the 244 as the GC are too costly IMHO. However that may change, if I can get ahold of a Freechex tool to make my own. Before I felt it best to ask others if I really need a GC at all. I shoot a Model 29, a Ruger Superblackhawk, and a model 92 all in the .44 Mag caliber------also a Marlin .444.