Not sure if this is the same as the Winchester high wall 1885 but appears quite similar.....
I have a 1885 low wall in .17 HMR.....not thrilled with it at all.
Maybe they are unrelated guns as I'm not at all sure about this.
What is your chief complaint?
actually two.....
1. almost complete inability to mount a scope.
2. very poor accuracy IMO.....and yes, somewhat related to inability to mount a scope.
My B78 has an octagon barrel, but came with bases.
My Browning 1885 has an octagon barrel, and I made shims of paper to measure how thick to make a metal shim to make Weaver bases to fit on the tapered octagon barrel and keep the scope tube parallel with the bore.
With metal shim.
Shot animal with shim.