I use them in my Siamese Mauser for serious hunting. I have it throated so they are seated to just under mag length. You won't have the problem with the #1 but I must crimp them and I use a Lee Factory Crimp die to crimp the case into the bullet as there is no canelure. I use 63 gr of RL7 for 2305 fps out of the 24" barrel. I have shot several elk with the Barnes SSP, two on license and the others were mercy killings of injured animals (I was a LEO in NE Oregon at the time). I did not recover any bullets with shoulder shots but from the exit wounds expansion was generous to say the least. I shot one spike with a very broken front leg at 25 paces in the junction between the shoulder and neck. He was fairly emancipated and wasn't salvageable so I used a frontal shot. The bullet penetrated the length of him and blew c**p out the exit wound a couple inches from his tail. all the elk I shot died like; "right now!". Ranges of all the elk I shot were the 25 paces to just under 200 yards. the Barnes performed excellently at all ranges. I highly recommend the bullet in 45-70s capeable of the higher loads. I refer to mine as a .450-400-70.
Larry Gibson