Just for what it's worth, I have a 270 Wby that was barrelled up many moons ago with a 24" Douglas Supreme Air-Gauged barrel on a 98 Mauser. It was the best barrel available at that time, and was chambered with the standard Weatherby freebore.
From the day I got it back from the 'smith, it has shot better than I expected, and velocities have been over 3500 fps (yes 3500) with 130 gr bullets, 3200 with 150. The rifle has around 700 rounds through the tube, and after more than thirty years still shoots an inch at these velocities.
It kills game our lighter game, sheep and caribou, like lightning with center lung hits using 130 partitions.
Having said that, I also have an old three-lug SAKO in 7mm Rem mag. It is just as accurate, but does not seem to be quite as sudden a killer, especially on lighter game like sheep and caribou. Comparing 150 gr bullets there is no question that the 270 dispatches game faster, and the 150 Swift A-Frame in the 270 at 3200 is just amazing!
I could live with either, but am very pleased with the 270 Wby.
