Is, I think what the long going argument between O'Connor and Keith was about. Jack got aligned with the 130 grain 270 - for that era, very fast and flat shooting, he said. Elmer had a velocity in mind - 2600 fps?? - if his rifle cartridge designs had more capacity, then he wanted heavier bullets, not faster. I am not sure either really did want the argument to be finished - both were causing bazillion copies of Outdoor Life and Guns & Ammo magazines to sell. Both guys pulled off hellaciously long kill shots in their day - with their "babies". Is most notable to me that Jack's wife Eleanor took many head of game when on the various trips with Jack - and she used a 7x57. So not fast like 270 Win, nor heavy hitter like Elmer's 338's. She just killed stuff - mostly very dead.
I do not have, nor will I have experience like Dr. Don Heath to drive a bullet through a 7 ton elephant's skull with 9.3x62 - but it was done - is actually pictures of that shot. From people with a LOT more experience than I will ever have - is a thing about "straight line" for penetration - drive a bullet too fast and it goes sideways on impact - not good, if you need to penetrate a couple feet of stuff to get to the vitals. But is nothing around here like that. Is an old guy I met in bush some hours from here - he thinks his 22 Magnum is about the most perfect cartridge for everything that North Sask bush has out there.
Don that i can call my friend despite being on the other side of the hunting chores for now never pushed too much the speed of his 9.3x62 for two reasons first is the pressure from the heat that we do not have that much here and the second he was not doing long shot with the 9.3x62 and used it as a back up rifle ... it worked even if during his life he liked bigger caliber he came back to the 9.3x62. i was tempted by speed as well but at the end the 9.3x62 is working great for what he was created ...