I haven't used either of those 2 newer IMR powders, but with bullets up to 110 gr, RL-19 has always been my mainstay.
For 115's -120's, RL-22/MRP has been excellent.
I probably should work up new loads with the newer powders, but I've got lots of '19 & '22 & they work just fine, so I'm not going to change until I run out of what I have.
The gain is not worth the effort for me; if starting over or new, yeah, I'd probably use something different today.
MM
