I went to the range to put my load work for my Savage 116FHSS 300Win Mag to a final test by shooting five shot groups. I adjusted the OAL from 3.340" to 3.3195" The bullet used is a 180gr TTSX. The brass is Winchester brass with CCI250 primers. There were three powders that produced the best three shot groups and highest velocities out of 7 powders tested last week. The three powders tested today shooting five shot groups were RL-22, W-760 and MRP. MRP was by far the best performer in a five shot test as the target indicates below and the velocities were exceptional for a 300Win Mag with this level of accuracy.
180gr TTSX, MRP, Win brass, CCI250 primers, 3075fps with an OAL of 3.3195" group size is .333"