My 30-30's all work very well with the Remington Coreloct 170 grain bullet. This includes a Winchester 94 with a 26 inch barrel, a pre-64 flatband carbine, and a Marlin 336 (safety-button version) that I got as a well-used bargain a few years back. I use 3031 for powder with these bullets. These guns all like the Winchester 170 grain Silvertips as well, but those are no longer around as a component bullet, and I'm kind of hoarding my stash of these. I want to try some 170 gr flatpoint cast bullets (plain base from a group-buy mold) as soon as I can find time and good weather to cast up a few. On the subject of cast bullets, the Lyman 311041 with a gascheck, cast to about Lyman no. 2 hardness, seems to shoot straight, and a lot of folks on another website appear to have shot some pretty nice deer with that bullet.