I love my 270Wby. It's more than marginally faster and flatter, too. I'm getting 130gr bullets (including Nosler E-Tips with a BC of roughly .490, I think) running 3450-3500fps out of my 26" barreled Mark V synthetic. Very accurate rifle and cartridge in my experience. Using a 5" circle as the target circle, that 3500fps gives you a 325yd point blank range, and only 22" of drop at 500yds, as I recall. The WSM isn't going to be as close at long ranges like it will at 100 and 200yds. Heck, I shot some loads with Hornady 130gr Interbonds that were max charge in the spring at 75deg one afternoon in August when it was 90deg, and they did 3600fps without so much as a stiff bolt or ejector mark. Mild primer cratering, but nothing I'd worry about, since it was a load that was worked up safely in cooler weather, and I don't hunt in 90deg.