The 4350s work well in my 300 with 150 & 165s as does RL19.
RL22 is promising with 180s.
RL26 is outstanding from 165 thru 200... better results with 180 & 200s.
RL23 is showing promise with 150s & maybe 165s, but I dont have enough left to do more testing. Pressured out too soon with 180s.
Have you chronographed your 67gr RL22 load? My testing started at 68gr. at about '06 speeds from a 24" barrel.
The Speer #15 manual has new data with newer powders for the H&H with 150gr+ bullets.
