The same with a rifle. As I recall, the biggest man carried the BAR. Everytime I pick out a rifle or shotgun I notice its weight, how it comes up to my shoulder, and how it carries in my hand. I try it with my hunting coat on and draw a bead.
Some rifles/shotguns have a good balance for carrying in one hand, some don’t. Any sporting rifle or shotgun that weighs more than 9 pounds is too heavy to carry all day.
My Winchester Model 94, .32 Win Special is a great brush gun.