I just bought a new 45-70 Guide Gun the other day and today while shopping at Three Bears in Palmer,on a whim, I picked up a 250 rd box of HSM 405 gr lead RNFP bullets. Really don't know any thing about this bullet but it does have a gas check. I would like to work up a load for my new lever action but not really sure where to start at as I find nothing any where on this particular bullet. None of my reloading manuals or the web has anything about them. Has any one tried any of these bullets and if so how do you like them? The price was fair and I just wanted them to use to target shoot and get use to my new rifle. The salesman at Three Bears said they have sold very well so someone should be able to help.Maybe they are a Cowboy load? About three years ago I bought a RCBS press,never having reloaded before, and with the help of this Forum I now load 9mm, 300RUM and a ton of 44mag. I am extremely careful when starting a new load and any and all advice is welcome and appreciated.