You can always tell an old shooter: he's the chap with a hand permanently cupped behind his ear.
My father became an expert shotgunner before the War, and would have had to fire a lot of cartridges to get that far. During the War, he was mid-upper gunner on a Lancaster bomber, so gunfire and engine noise. He's been pretty deaf since I was a boy.
In the 1960s, I was UK Army Cadet Force (Boy Scouts with guns) and used .22 rifles indoors and .303 Lee-Enfields in the open. No ear or eye protection.
When I returned to shooting in the late 1970s, ear protection had come in as standard practice, both in the clubs and in the Services. In the middle 1980s, my club decided to make eye protection standard after a few interesting experiences with handloads, and the practice was standard in both the civilian and military sides of shooting by 1990.
The last time someone asked my advice it was a shotgun hunter. I suggested that in the field, ear protection should be discarded to help all-round awareness, but given the number of lead pellets flying around, he used eye protection at all times.