Hello All - Realizing this post is really old, just thought I'd provide an update. Finally obtained some .41 Special Ammunition from Reed's RAR - specifically the button-nose wadcutter in 205 Grain at 950fps. No issues with this load. Have ordered some HSM Cowboy Action .41 Magnum (210 grain@969fps) - will see how this works (proceeding with caution). Welcome any comments! Mike. PS - The conversion was done long ago - found its way to me. I would much rather have the original!