Those 110 grain loads should not be punishing at all.

Position at the Bench should not allow a recoiling gun to "hammer" you. (Hold and Pad as needed)

IMHO - A Krag should be assembled to sit naturally on its bedding at front of receiver and barrel-channel. The rear of the magazine-box should be in contact with wood to serve as a 'recoil shoulder'. Then, tighten front guard-screw very firmly.

Rear guard-screw is just snug ... too tight and it pulls rear of receiver into wood like a wedge and lifts barrel, screwing up harmonics.

I would welcome other views or experiences of others.