In that era, you could count on having to shoot weak handed in 'draw & fire' as well. The game was quite athletic then, requiring going over 6' barricades, shooting while hanging onto a rope from either side of a wall, prone, etc. We had a US Viet Nam vet at one of our Nationals who was on crutches having lost a leg as a door gunner. He threw his crutches over the wall, climbed over, leaned against the wall to shoot, retrieved his crutches and moved on. Watching him brought a lump to your throat.
We told him he could have a by on the obstacles and he said - "No one over there gave me a break and damned if you're going to." Made the couch potatoes cringe who thought things were too tough for them.
I remember shooters from the "Rainier Combat Team" of Seattle going prone to shoot single draw & fire at 25 yds! No sh!t. And they made it in 2-1/2 seconds. They wore a military style uniform that consisted of tan pants and shirt with crests and creases that would make a Marine proud. Several were vets.
Yeah, it was a different game then, not necessarily better, just different, the emphasis now being on close, quick & dirty. The .45 ACP ruled and the 9mm was almost a joke. Trigger jobs were a dark science, hit or miss depending on the 'smith. One told me he lost money on every trigger job. Now it's expected a 1911 will have a decent pull out of the box as well as the basic mods that were once hi tech.