>If you make the case capacity and pressure in between those two you could get something that is either between those two both in power and longer barrel gains, or you could end up with a lighter-recoiling and possibly more powerful 357mag with almost all it's barrel gains if these increases end up being multiplicative, which i suspect is the case so you can easily beat 357 if you just scale up 327's capacity to the caliber.
That's good to hear. It's not that I want a boutique cartridge, I'm just theorizing about equipping a military that doesn't need to adhere existing standards and is supported by its own arsenals.
>Isn't it rivaled by 6.5CM?
No, that's 6.5×47mm Lapua. Both that and 6.5 Creedmoor have vaguely the same length and casehead as 7.62mm NATO, and their performance is nearly the same. 8.58×70mm Lapua Magnum is real magnum cartridge.
https://en.wikipedia.org/wiki/6.5mm_Creedmoor
https://en.wikipedia.org/wiki/6.5%C3%9747mm_Lapua
https://en.wikipedia.org/wiki/.338_Lapua_Magnum
>What on earth uses these?
Vid related. Nearly every STANAG magazine is capable of accepting that spoon, and the US still issues its 5.56 ammunition in bandoliers filled with chargers.