+1 on the 8X60R Krotchopek.
I have an 1886 Styer and if you get H&R /Marlin / Reminton, to make a rifle someone will make ammo so I can shoot the funky tube gun.
If you have not seen an 1886 Styer it looks like a medium bore version of a Mauser 71/84 with a magizine cut off lever.
I think it would be great fun to shoot a deer with it.
The bolt handle it a little too far forward along with short and strait to reload from the shoulder.
But this is a post about H&R handi rifles and not about the tube gun leaning against my book shelf.
Oh speaking of the 71/84 Mauser why not add:
11mm Mauser to your list?
But this will end up in the H&R wish list section.