Yes, I must admit ... the drop and stock design of a Sharps
was never intended to be an offhand rifle ... less Quigley or not, with his 782-yards shot, LOL!
I had one, a Pedersoli 45-70 Hartford model, THE best built production gun I ever had bought. But it royally su@ked wind for offhand shooting! I shoot Schuetzen rifles and have even built a few and honestly I've never seen a Sharps on the offhand line. Crossed sticks shootin'? You betcha - nice choice!
And note it has NOTHING to do with the weight of the rifle! As Harry Pope, the famous barrel maker, barely weighed 110-pounds soaking wet and yet some of this 200-yard offhand record targets (duplex loads to boot) have never been equaled ... yet. And he shot a 14-pound rifle! But again, the stock design, the drop at the comb and the ability to use a palm rest is what sets something like a Stevens model 52 (shown below; just one I built), or a Ballard, or Winchester 1885 High Wall, etc. apart from the
fairly 'straight stocked' Sharps ... at least for offhand use.
View attachment 1180810
P.S. - One also rolls their back in a curve backwards, throwing their hip towards the target forward, whilst in the Schuetzen offhand shootin' stance ...