IIRC, the Express came with an unneeded twist change. Not super sure, too many years past.The "7mm Express" was a marketing gimmic by Remington to "rebrand" the cartridge previously known as the 280 Remington. That occurred int he early 80's IIRC. Weld been using 280's in my area for years, quite popular in fact. Remington was trying the same idea they used on the 244/6mm Remington. I never saw the need as the 280 had no issues I ever heard of.