The original Iver Johnson was in business from 1871 to 1993. Unfortunately, there are no records of manufacturing dates. The current business by that name has nothing to do with the old one.
Fiocchi loads the ammo. This guy carries it. Not horribly expensive either. $11.24 per 25 for #5 shot. #6, 7 and 8 shot is $14.99 per 25. Can't imagine why the shot size changes the price. It's lead shot, so it can't be used for hunting migratory birds. Some Provinces are saying no lead shot period.
Have your shotgun checked by a smithy before you shoot it though. Add the W's. .bilozir.net