Is the 45/70 a better elk, moose, buffalo, or brown bear caliber out of a rifle than the .44 mag? By a good bit, I'd say. I don't think the posting I made earlier denied that. It's just that too many people post on these sites about problems with recoil from the .45/70. That's why I would go with a .44 mag' for elk out of a rifle as my recommendation for many of us. AND, it doesn't have to one of Randy Garrett's loads, either. That website was just to show what the under-rated .44 mag' really is capable of.
If you can handle the recoil, which MSP Ret' posted as being less than a 12 gauge, then the .45/70 is better. MSP' is on solid ground, I believe.
HOWEVER, 300Winman's postings about .44 mag' velocities are in line with J.D. Jones observations in 'Hunting for Handgunners' that he co-authored with Larry Kelly. J.D. said his 320 gr' hard-cast would do approx' 1400 fps out of a 7 1/2" revolver safely. It's in the chapter titled: A Treatise on Bullets. On page 181 he says this load has killed elephants, cape buffalo, and rhino! It's all in one paragraph so there's no misunderstanding that this load out of a revolver has done those things, at that 1400 (approx') fps velocity.
If I was going after elk with a rifle I'd go with the .44 mag. If I was going after elk with a revolver I'd prefer a .454 Casull, but would get my elk with a .44 mag' if I had to.
Take care, all.