mgemmill, sorry for the delayed response. The Federal 160 gr. Barnes shells work very well for me in the 7mm. The 150gr. Remington Core-Lokts also work pretty well in the 7mm. The .270 is more picky. It only likes the 130 gr. Remington Core-Lokts and even that is not great. I have always wondered if I damaged the .270 barrel. When I was a kid, I didn't know to let the barrel cool and I can remember getting it pretty hot on occasion.