You're right Tom. The ideal round is one that can leave all or most of it's energy in the target, not in the wall behind them. Older reports I have on testing stopping power were based on live goats. Can't remember the name of the test but from memory the rounds were tested on mature, similar weighted male Boer Goats. The .45 ACP was always on top as far as handguns go although I'm aware that ammo and some newer calibres may have changed that. The fact remains though that if it would kill you dead in 1965 it'd kill you just as dead now.
Nothing beats a 12 guage close up though. Except for maybe a 10 guage
Whats going to hurt more, a tennis ball at 100mph or a brick at 40mph? OK, the tennis ball would still hurt
Nah my Model 70 is after '64. There is a lot of hype about the older actions. I've seen and shot a few but to be honest you get good ones and bad ones, just like post '64 Mod 70's. Mine will shoot 1/2" groups at 100m and even with the old badly pitted, standard blued barrel in plain old .22/250 Rem the Mod 70 would still shoot 1" groups easily. My stock Tikka T3 .25/06 and bedded and floated CZ Model 527 .222 are also good for 1/2" groups at 100m
My .25/06 loves 100gn Nosler Ballistic Tips, my .22/250 40° Ackley loves 55gn Ballistic Tips or V-Max's, and my .222 loves everything
Although I prefer Speer 50gn TNT for what I use it for.
I haven't done much shooting lately due to chainsaws but I used to do heaps. Mainly kangaroos under permit on farms next to national parks or heritage listed scrubland. All they are is a bloody breeding ground for crop wrecking animals like roos, emus, rabbits, and now goats in my region. I've dropped 10's of 1000's of kangaroos and despite that they're still everywhere - certainly not endangered as many people overseas are led to believe by mobs like PETA.