It looks like the price difference in ammo is a wash when you look at a fifty to sixty year period with inflation. I think things have changed when it comes to shooting and its purposes. A lot of people buy ammo now to just purely blast away, easily going through two hundred rounds in an hour. I know because I'm trying to break my fiancee of the habit.
I watched a greybeard years back with a .41 magnum take a whole hour to shoot through fifty rounds. He shot a quarter size hole at twenty-five yards for every single one of those targets he had. It was plain jaw dropping at the time. I've never managed a consistent hole that size with my .44 magnums (Redhawks and SBH).
I remember shooting with my grandpa on his friend's property. Shooting was a hobby and get together with friends for him. In between conversations, every ten to twenty minutes he'd shoot at empty coke cans and empty cigarette packs with his Colt 1911 (I think it was an oldie but goodie, my uncle inherited it) and Colt Diamondback .38 special (again my uncle got it). Shooting was an all day affair it seemed and he maybe shot a hundred rounds. He spent more time chain smoking and laughing than shooting.
Folks today live with a faster pace, and greater expectation of consumption and use of things. Fire two hundred rounds in two hours, go home shower up, and step out to the bar afterwards (unless, or especially, if you have kids).