I have a 2009 336ss in 30 30, and it really likes the Remington 150 grain Core-Lokts. I've read many posts on MO indicating that many 30-30's like the 170 grainers, but mine seems to prefer the 150 grain. It's a good thing, too, since Remington Core-Lokts is the most affordable ammunition around. I think I pay 14.27 a box at Walmart.