Nostalgia & Looks......The reason you would wand an all brass shotgun shell is...
Black powder will burn through plastic hulls
Black powder will burn through plastic hulls. The bigger gauges will not survive one heavy load. The smaller gauges are good for one time.
It is nothing to do with cool. What was it Mark Twain said about not speaking vs leaving no doubt. Google it.
[Vintage Damascus barrels are not safe to shoot with any ammo. /QUOTE]
Not true. They MIGHT be, they might not be - an experienced gunsmith can do some tests can tell. Where I shoot, many og the guys in their 70s and 80s have older guns, especially some nice English ones, with Damascus barrels and they shoot them all regularly. Granted, they're not shooting Fiocchi uber pheasant loads, but they have fun shooting doves, pheasants and clays with them.