memtb,
How are you figuring the 100 yards of added "effective range"? Trajectory, energy?
I've done considerably hunting with both the .270 Winchester and .270 WSM on big game up to 800 pounds or so--enough to say I've never noticed a practical difference in trajectory or killing power. If you load a typical spitzer boattail to 3100 in the .270 and 3250 in the WSM (which is about the real-world difference), then sight them both in 2" high at 100 yards, the WSM bullet will land about 2.5" higher at 400.
The recoil difference, using Sierra's Infinity program and an 8-pound rifle, is 21.0 foot-pounds for the Winchester and 26.7 for the WSM. Whether that's significant or not depends a lot on the individual shooter.
Precisely.....good advice......The more shooting I do and witness at beyond 300 yards, the more I come to appreciate the tried and true cartridges.....the .270 Winchester among others.
