I had a 7STW for a few years. Barrel.life was just over 600 with FAST 160s.
I have a 28 Nos now. It only comes.out of the safe for elk season. 86 rounds down the barrel. 195s @ 3099fps. I expect about 600 rounds max barrel life. I have loaded for a bunch of these. Running a 180-195 @ 3100-3200, I have seen accurate barrel life range from 400 to 700 rounds. Keep a bullet 3050 or so, and you MIGHT get 800 rounds of accurate barrel life depending on how you shoot it.
I have a buddy who is on barrel #3 on his 7RUM. 195s @ 3200. His barrels last about 400 rounds of accurate life.
If you want 1000+ rounds on a barrel, 7RM or 7PRC, .284 Win.
If you want 1500+, 7SAUM, .280AI, 7SS, Etc.
If you want 2000+, 7-08, 7SWC, 7SAW, etc.