For irons I used a Weaver receiver mounted aperature sight. I don't like tang mounted peeps.
At various times (load testing, etc) I threw a Leupold 2.5-8X and a 3-9X on it. With those in place, the gun shot MOA or better with Remington factory 405 grain jacketed ammo as well as a couple handloads.
I did the same with a Cowboy 336 in .38-55 and got about the same results, MOA with WW factory ammo and a hair better with the 220 grain hornady.
I'm not that impressed with the standard 1895 and 336, but the cowboy versions will flat out SHOOT.
Tom