I have a 270 WSM with 7 1/2 twist and shoot 165 grain Nosler ABLR. I use the maximum powder charge of H4831SC Nosler suggest in their tables for the the 270 WSM. It is better than 1/4 MOA at about 3000 FPS. I don’t know why, but can’t get accuracy better than 1 MOA for the 150 ABLR. Very disappointed. If anyone has suggestions for powder and loads for the 150 ABLR, let me know. Thank.When I get my barrel back, 277 1-9” twist 30” finished length in 270 Bee, I really want to give those 165 ABLR pills a good run. Had excellent results with the 150 ABLR in it prior to sending it off to be cryo’d, now due to more COVID idiots that can’t stay home, I have no idea when it will be back.
I lopped 2” from this barrel and re-crowned just prior to sending it off.
I’d like to see some numbers on the 165’s if you can have time to test those.