I was set on using a 300gr Hornady HP for my 45-70 marlin but everyone I talk to and everything I read online says 405gr lead RN or FP for deer hunting. What I'm wondering is other then the weight why is a lead bullet better for the 45-70 then say the 300gr HP I was using. Do you get more expansion from lead? Coated or non coated for the Marlin? I hit a big doe last night at 60ish yards broadside and got a complete pass threw but the entrance and exit wasn't impressive and she ran for awhile.