Ross Seyfried in an article on the .270 Winchester,mentions that the most successful safari he guided was with a elderly man and his grandson. They used a .270 Win and 150 gr Nosler Partitions from lion on down.
A decent size elk weighs around 650 pounds??? A nice lion is 500 pounds.
No problem killing an elk with a 270 Win. Should work fine on a lion.
Should work fine; however no less than a 375 H&H for me on lion.
I have crossed lion on foot in Zim and saw them from the cruiser in Mozambique and Tanzania. I am not ashamed to say they scare the crap out of me.
Because we all know lions and elk are built similarly.