If you're going to make your own or reload with lead bullets, you need to match the hardness of your bullet with the velocity you're going to push them at and make sure that they fit your bore correctly. This site will tell you all you ever wanted to know about it----
castboolits.com
Thanks for the info. I'll check it out. FWIW, on these lever actions, I'm pretty much wanting to load for plinking so the cowboy action loads are the "hotness" I'm looking at.