LJ-MosinFreak-Buck
Member
To be a really "mature" system, worth putting out for sale, you'd need the gun to really fit the cartridge. I'd expect the bolt travel and ejection port to really fit the cartridge. That would be a super fast-working, light, compact action, and probably worth a look.
This.
If you can find a way to scale down the action, it would be nifty, and lightning fast. Recoil would probably be a little stiffer, but you can't deny that with shorter bolt travel, your cycling would be lightning quick.