I've been experimenting with cast for the 30/30 and want to take it hunting now. My first load is an RCBS 180 gr. FP (which weighs 192 gr.), chrono'd at 1865 fps. Hardness of the bullet is 8-9 SAECO, or about 15 BHN. The second load is the Lyman 169 gr. RN 311291 (which weighs about 175 gr.), also chrono'd at 1850 fps. BHN is an identical 15. I'm concerned about expansion within 50-75 yards. If the bullet won't expand, it would be like stabbing the critter with a blunt pencil (very fast). I'm content that I can place the shot at these distances, but I do feel some expansion is necessary with such a small diameter bullet. Or, another option. chuck it all and use the 45/70 again. Or the .444. Or a 44 magnum. Or a 41 magnum. Or a .357 mag. Or, well you get the idea.