It could be as nun says, that the bevel is not fully there. You may also have some corrosion in the edge that causes the edge to break down while shaving.

With a heavy blade like that, you certainly will get little to no feedback, so that's normal.

I have honed up a couple of really old razors, though I don't really know how old they are or how they would relate to yours as far as steel or age, but the ones I've done have come out to be great shavers. I like to finish the really old ones on my Thurry - it seems to work really well for them.