I recently purchased a Magnum Research BFR in 45-70. I am going to start loading some ammo for it next week and am looking for input as to maximum yet safe loads. The manual says "up to lever action 45-70 ammo." Does this mean handloading lever action loads or factory lever action loads which are a lot weaker? I don't plan on shooting a ton of super hot loads due to recoil but it would be really fun to shoot a few. Does anyone have any experience with handloading for the BFR 45-70? Thanks in advance for any input.