ORIGINAL: eldeguello
ORIGINAL: M77man
Actually I just compared the balistics in the same weights and types of round. The 270WSM beats the 7 Mag in terms of fps and foot pounds of energy along with trajectory and wind drift naturally. Now if 270 WSM were more widely available and less expensive then 7mm Rem Mag, then it would be the logical choice.
Only if you are stuck shooting factory ammo, and choose to believe the MV claims they are making to sell the shorties!
They don't lie about their ballistics. Any idiot with a $50 chrono can check it. It's common knowledge that they use SAAMI chambers (minimum dimensions) and 24" test barrels (onmost rounds). It says as much on the catalogs.
The other thing about factory ammo, especially the short mags is that they can get better performance from the same weight of powder than a handloader can. They use different powders that we don't have access to, and they use different shaped powders, sometimes in a blend that we cannot reproduce. Plus, they can load compressed powder charges with their special equipment (Hornady Light Mag etc).
It mostly comes down to believing what you want to believe, not what's actually happening.