An 1886 is an heavy rifle - 8-1/2 lbs. This alone makes it easier to shoot than a 6-1/2 lb Marlin. The bottom of the butt plate should be high and tight under your armpit. You get a lot more recoil shooting from a bench, probably because you're leaning into it, sitting, and can't rock back. I bought a couple of shoulder pads that go over your shirt. One's thick and spongy, the other is thin and stiff. Both work well to distribute the force. Without the pad, I developed a huge hematoma (the doctor called it a "hematomato") that eventually made a bruise down my arm and side. With the pad, I experienced no lasting discomfort, and no "hematomato."
These stocks have a lot of drop, more like a shotgun than a modern rifle. They're meant to be fired with your head fairly erect, no cheek weld. If you place the butt higher on your shoulder to get a cheek weld, the curved butt is going to punish you.