I've probably killed more big game with the 7mm SAUM than 99% of the people who've owned one. That doesn't mean it wasn't a commercial failure for Remington, the reason it's very difficult to find Remington-brand 7mm SAUM brass: They decided to cut their losses.
It's also why Norma and Nosler started offering 7mm SAUM cases. In fact, whenever the original manufacturer gives up on a cartridge so much that other companies start offering brass, it's sure sign the original company was losing money on it.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
