Great info thanks!I’ve had great luck with R-16. Picked a charge in the middle of a node and seated .050 off, which is barely mag length.
I just started into another box of 500. Different lot of bullets slowed down about 15 FPS and change my zero slightly with the same exact load. Velocity is 2775, out of a 24” and starline large primer brass. My last check the SD was 9.
R-26 did ok but showed higher ES/SD . I didn’t play much with it, since it was faster and I really want to use the same barrel all season.