Any good 130 or 140 grain bullet with enough H4831 to get 3000 to 3100 fps. I am presently using the Barnes 130 TSX. I have used the Hornady 140 BTSP with really good accuracy. Both loads are above the book with today's data.
H4831 and H4350 are both great powders for the 270. Years ago, out of economy, I used 4831 in the family's 30-06, 25-06 and 270s.
I rarely shoot the 270s anymore although it's one of the most inherently accurate and versatile calibers out there for North American game.
Lately I have been experimenting with the new IMR Enduron powders, particularily 4451 and in a couple 270s, a 22" barrel pump and a 22" barrel bolt-action. Ladder loading for pressure and velocity 4451 equals IMR's 4350. Temperature sensitivity is OK (35° vs 75°) A real plus; 4451 burns considerably cleaner. Now for the accuracy tests.
I'm seeing a lot of positive chatter on the web about 4451 in the 270. It's a powder your buddy may want to look into.
A forum community dedicated to hunting and fishing enthusiasts in the Utah area. Come join the discussion about safety, gear, tackle, tips, tricks, optics, hunting, gunsmithing, reviews, reports, accessories, classifieds, and more!