Boddington says you can hand load the 45-70 almost to 458 win mag power so the 45-70 can do the trick. The marlin is a very strong gun and can take hot loads that will work very well on big cats and big bears and you can shoot a lot of round in a shot period of time. That said, I still like my 375 H&H for bears and would rather have something like a 458 lott or better for elephant and buffalo. Of course, shot placement is the most important thing. My dad grew up hunting white tail on the banks of the Ohio River in Eastern Kentucky with a .22 rim fire and never needed more than one shot and never lost a deer while I on the other hand hit one with a .50 cal black powder rifle from 50 yards I tracked for miles and never got him.
Greywall, anything that fires a bullet will kill anything that lives if it hits the right organ in that animal, that however doesn't make all firearms the best choice for all animals. I too have killed a lot whitetail deer with a single shot Winchester mod 67 .22 lr during WWII when meat rationing was in effect. I was the oldest boy in my family, and four families moved onto my grand father's ranch in the Hill Country of Texas. My job was to gather meat to feed a lot of people while their men were fighting WWII. This was a subsistance necessity of the time, and not frowned on by anyone as long as you were only taking what you needed to feed your family. Black market people selling game meat were arrested on the spot by the feds.
Because the .22 lr will kill deer with a percise head shot, doesn't make it a deer caliber,it was simply that it was almost imposible to get any ammo other than .22 rim fire, or 12 guage shot shells, durring the war, and you had to conserve it by makeing one shot kills, hence the head shots. It also is not an indication of the 45-70's capability on the Cape Buffalo or Elephant in Africa, simply because a few have been killed with that cartridge.
In both cases the cartridges used were, and are illegal for the use they were put to. In the first case it was a case of need, in the 45-70 case it is not a case of need, but a case of total disregard of the law, and common sense.
There is no need today to use an under powered illegal rifle to hunt elephant, or Cape Buffalo, when there are truck loads of rifles that are not only legal for that use, but are far more capable in that persuit than the 45-70.
I simply do not understand those who insist on useing a chambering that is not only under powered, but illegal as well in this day and time. I personally would rather have a good CRF bolt action 375 H&H with 300 gr softs and solids for Buffalo, or elephant than anything chambered for a 45-70 gov.and in Africa many decry the 375H&H as being minimum for buffalo, and insane for elephant in thick jesse, but is far and away better that the 45-70!
Don't get me wrong I'm not downing the 45-70, or the lever action rifle in any way, simply stateing facts, something that seems to have flown over some heads on this subject! Loaded properly the 1895 marlin 45-70 is fine for a "make do" camp gun for big Bears in North America,far better than a pistol, but I can assure you it is not up to general use on Cape Buffalo, and certainly not for ELEPHANT!
................................just my :2c: