Home Forums Reloading Varmint Rifles 222 Rem Mag Data for Alliant Powders?

R10 burns very, very hot. This makes it tough to get the carbon out of the barrel, so is R#15..

H335 and CFE are excellent powders for the 222Mag with 50 and 55's, they clean up easy.

Speeds I am getting with the CFE and the 22/204 are unbelievable with 69g Sierra's, 3350 is the accuracy node with 69g Sierra with a very short freebore reamer, .015, in a 9T Shilen select match.