I used to shoot 180 Partitions or 180 Sierra ProHunters in three pre-'64 Model 70s, one of which is a featherweight. I almost always used H4350 but tried H4831. It worked as well as H4350 but required compressed loads. Several years ago, I was working with the 150 TTSX BT in a .300 Winchester Magnum (Rem. 700) and a .300 H&H Magnum (pre-'64 M70). This bullet shot very well in both guns. I decided to try it in the .30-06s using H4895 powder. The Barnes was noticeably more accurate than the Partition and ProHunter. The 150 TTSX is all I use in .30-06 now and also in a .308 NULA. Took my best elk so far with this bullet in the .308.