I have also been playing around with my pre 64 30-06 and 190 ABLR. The rifle shoots 180 ABs at 2780 FPS into 3/4" groups, but wanted to see if I could stretch it out.
Powders I have are RL17, RL16, H4350, Hunter, and RL26.
I am not finished testing, but the best so far was the only load I tried with RL17. 54.5g at 3.350". 2 touching and a 1" flyer. I don't have velocities in front of me, but believe it was right around 2,700 FPS.
Hunter shot very similar groups and velocities to RL17. I tried 58.0 and 59.0g.
I wanted RL16 to work because it is more temp stable than RL17, but only group I tried with 55.5g was about 2", so probably won't mess with it much more.
RL26 has potential. A little bigger groups than RL17 or Hunter (around 1.5"), but velocity is around 2,800 FPS with 62.0g and no visual pressure signs, but probably about max that I will go. I will play with seating depth some more on this.
