I was testing some loads this weekend also for my 270 as my previous testing showed H4831 to be the most accurate. I tried some RL 26 with 150's but just couldn't get the accuracy.
IMR4350 showed some promise but H4831 ended up being the powder of choice with 140's. 59 gr of H4831SC is what I'll be using with 140's this year.
I may order some 145's eld x just to try out, thanks for posting your results.
