In three different 270s with 130 and 140 grain bullets I've gotten my best accuracy with H4831SC. I used RL 17, IMR 4350, H4350 in all three as well with OK results but not anything like H4831SC. Reloader 26 was great for 150s. 61 grains gave 3000 fps with acceptable accuracy but not stellar accuracy. H4831SC was more accurate than RL26 as well with the 150 partition although velocity was closer to 2800 with what I considered to be a near max load.
IMO H4831SC is hard to beat in the 270 for 130 to 150 grain bullets. I would be curious to try RL23 at some point if this ammo components shortage ever gets sorted out
I agree with you for the most part, I have tried many powders over the years in several 270's and H4831SC has always been the accuracy king in every one of them..............I fell in love with RL26 because I can honestly get 200fps more velocity out of the 140-150gr bullets I have tried.....but not with quite the same accuracy.
The original H4831 that was around before the short cut version and the "EXTREME"era I think even worked better.
