With the 150 Nosler ABLR I’m using 61 grains of 26 in Federal cases.
I stopped at 60gr. in my 270, but it has a 22" tube:
Pretty good accuracy from the old girl too....
That was the 22" and change Tikka" barrel. My 70 Fwt is doing excellent with 130 Tipped TBBC's as well. 3150 seems to be a snap with that set up and accuracy seems pretty decent from my initial try.
Rug3, I'd bet 26 and 160 Partitions will scoot buddy. I have some on the shelf, but haven't tried them yet in my 270 Win. They were screamers though in my 270 WSM.