Kind of off-the-wall, but it "is" period, sort of: I recently converted my H&R BC to a "Schuetzen-Style" with hooked buttplate and Pope-style palm rest and trigger guard (yes, you have to saw off the plastic triggerguard). Purchased a rollover-style Monte Carlo buttstock and reshaped it with rasps to the Schuetzen style (not enough "perch-belly", but I never liked that much). Took the peep sight and base completely off and replaced with an old Digie GunWorks "Swiss Diopter" sight I picked up years ago, with a 1 1/2" disk with a .045"' aperture. With moderate loads, it is a pleasure to shoot, out to 400 yds "on your hind legs, like a man" as old Harry Pope would say. Impresses the fellows shootin' off sticks!
I'd LOVE to find a (discontinued) 38-55 "Target" barrel for the H&R 1871. I have even considered re-lining another 45-70 BC 32" to 32-40, but doubt if H&R would fit an "altered" barrel...