I'd say that any of the WW2 war time cartridges, 8mm Mauser, .303 Br, 7.62x 54r, 30-06, (I'll throw .308 in here) etc., calibers are about the high end of any type of sustained shooting and they will beat up the largest of us when shot through bolt guns.
Likewise, 2 and 3/4" 12 gauge slugs are in the same category through pump guns. Fun, but you're going to bruise and be sore the next day.
Larger calibers or longer/magnum slugs just aren't "fun" past a handful of rounds. Actually, they're kind of abusive.
Likewise, 2 and 3/4" 12 gauge slugs are in the same category through pump guns. Fun, but you're going to bruise and be sore the next day.
Larger calibers or longer/magnum slugs just aren't "fun" past a handful of rounds. Actually, they're kind of abusive.