I am glade to see more interest in the .277 as the .270Win. is one of my favorite cartridges. As said above a .277 165gr. ABLR bullet is a bit more exiting than a new cartridge. I may have to build a .270 rifle with a faster twist, only problem there is the money
!!
I think the biggest problem with any new 30 caliber is the market is so flooded with so many 30 calibers and so many of them duplicate each other it's hard to bet the old tried and true ones, and there is a lot of them.
Nosler has a 35 Nosler registered with SAAMI, that's the one I'd love to see be offered. The 35 caliber just don't get the love it deserves.