It's kinda the same idea, except I don't know of any 3 1/2" shotshells loaded with 7/8 oz. of #9's for skeet. Personally the RUM and 3 1/2" are losers in my book. The 300 RUM is a poor seller, in my opinion. So they download it to make it appropriate for lighter game. Problem is that most North American game can be taken with the 30-06, so why the overkill? You get to choose one gun, and basically one brand of ammo. Good for Remington, bad for you. If I had to choose, I would just buy a 300 Win Mag, and have a ton more choices in guns and ammo.