- I'm guessing the reason for the redesign is for a couple reasons.
- Shortening the case allows a slightly longer neck and allows the throat design to be changed to allow the modern longer heavy projectiles to be seated out close to the lands. (Similar to Creedmoor, PRC) (This is also probably a pretty good reason why the 7SAUM is significantly more popular nowadays than the 7mmWSM).
- The shorter shoulder also stops accidental chambering of 270WSM in the 6.8 Western Chamber
- Easier to bring hype to a new cartridge than and old one
- If you starting making 170 grain 270wsm loads inevitably a bunch of clueless hunters would buy them and complain they dont shoot out of the traditional 11 twist rifles.
If they can get the BC up on some of the 277 projectiles it will create another middle ground with extremely efficient high bc projectiles that dont need a massive case to launch them like the 230+ grain 30 calibre options requiring large magnums to get them going.
Be interesting if they can get a BC comparable to the 180-195 7mm projectiles.
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