It's a long story, but bear with me:  I have heard and read the many reports that the 30-40 cartridge is highly accurate.  Unfortunately, my model 1898 has a rough bore, plus my eyes have reached the age where I really cannot focus on the tiny slot in the rear sight and the narrow blade of the front sight.  When I shoot my 1898, I feel good just getting all the shots on the paper at 100 yards.  So I set out to explore other options for the 30-40 cartridge, and I ended up a few months ago buying a modern Browning made-in-Japan copy of a Winchester model 1895 lever action in cal. 30-40.  It is a very nice rifle with a very smooth action, but because it has top ejection, a standard scope mount cannot be installed.  When I shoot it with the buckhorn sight that is standard on the Brown/Win model 1895, I still cannot shoot very well due to my limited eye focus.  I asked a gunsmith about installing a pistol scope on the barrel forward of the ejection port. He would have to custom build a mount, and he said it would cost $400 to do that and install it, not including the cost of a scope.  Darn, I wanted to shoot this rifle to its, and my, full potential; but I feel like I am wasting its potential with the buckhorn site.  Even installing a peep sight on the side of the receiver would require custom work and would be expensive.  Any thoughts out there about how to proceed?  I am asking the question in this forum, because very few other shooters appreciate the 30-40 cartridge.