If you think a too hard and too fast 45-70 can't lose a deer, You show colors that bleach has run over.
Ask Whitworth and I wish he would respond. He was with me with one, double lung shot, well over 200 yards with pink lungs, just a hole. Yeah hit the spine every shot but most of you can't hit a pop can at 100. My heroes! The wrong boolit in a 45-70 can fail but darn it is a BIG gun. Fools proliferate on shooting sites. Of all of you I would trust two, JWP and Whitworth, the rest pop keys.