madsenshooter - My experience is with model 1898 & model 1899 Krags. As a rule, the receiver ring has been nicely fitted on my stocks by the Armory and there has been amazing interchangeability.

I put the barreled-action in the stock and let the receiver ring and barrel 'bottom out' in the channel. I hold them in place, encircled by my left hand, as I insert and tighten the front guard-screw, firmly using a 'Chapman' screw-driver handle with appropriate bit. I then put the barrel-bands on and finish with the rear-screw, just snug. I never felt the need for a huge screw-driver or very heavy torque.

I believe too much force on the rear guard-screw could potentially split the stock vertically, behind the tang.

IMHO - The Krag stock is a fragile customer as military stocks go.