I tried H4350, H414, and IMR7828ssc with 75gr Amaxes in my 8” twist 22-250. Velocity was good but accuracy was lacking. Then I tried R15. Consistently bug holes with groups in the .3 -.4” range and gives me just short of 3300 fps. It’s the proverbial lightning bolt and easily the most fun combo I have.Hey all I just picked up a new 22-250 with 1:9 twist barrel and need some recommendations for powder and loads. I’m planning to run either 69gr Sierra mk or 73gr eld Match bullets. Thanks in advance!