As the name implies, Benchmark Powder is an Extreme Extruded propellant was developed for precision cartridges.As such, it is ideally suited for benchrest and small varmint cartridges like the 6mm PPC, 22 PPC, 6mm BR, 223 Rem. and 222 Rem. Additionally, it performs superbly in the 204 more info Ruger and with light match bullets in 308 Winchester.W