Why do you have to keep bashing the 45-70? If you are hunting in the lower 48 there is no reson to try and complicate things. I shoot 350 grain Hornady round nose at 2,000fps with 60 grains of Varget with Starline nickel plated cases in my Italian double rifle. It's accurate, does kick a little, but the pressure is in the 28K neighborhood! I love doing things just for the sake of the challenge, but sometimes logic just prevails.