My loading manual don't have data for this fairly new round. However there's a heck of a lot of good competition for 7MM.........My manual shows 11 7MM cartridges and the RUM makes 12.

Will it be chambered by others?????....Man if anyone had a crystal ball like that, we'd be sitting on Remington's payroll right now.!~! Who would ever have guessed that a .17 caliber rimfire would become so popular?

I look at it's use and it's a fine long range gun for big game such as African Plaines game and North American elk, moose, and caribou. However, there's a whale of a lot of competition for that job from the .264 all the way to .338 Mags and add them up....that's a lot of guns!!!!!!

I don't believe the 7MM STW seriously dented the popularity of the 7MM Rem Mag and I'm not sure the 7MM RUM will either.....but as I said...My chystal ball is very tarnished!!!

Get dies and shell holder from RCBS. They should be in stock.