Hello: I am using Jeff coopers ideas on my scout rifle. Making it compact, and light as possible. His idea for the long eye relief scope was to preserve the shooters peripheral  vision  allow easy reloading, and avoid hitting your eye with the scope from recoil. He also liked the idea of a magazine cutoff on the rifle.  Well the krag has the cutoff built in so that's a plus. He also said it should have a 22 inch barrel.  My barreled action just happens to have a 22 inch barrel.  He liked the .308 cartridge in his design. I think the 30-40 krag is in the ballpark in this respect.  Keeping the weight down for the rifle and me is the main problem so far! Lol.