I took my Uberti 1885 .45-70 High Wall out today with my handloads of 300 grain lead bullets behind 50.0 grains of Reloader 7. What I learned was is that this gun hates those bullets, groups were non-existant, and the barrel leaded badly. Velocity was about 2000 fps. Am I right in thinking that with the older style of rifling, that these guns prefered heavier bullets? I just ordered some 480 grain lead bullets from Baldy to try and work ont he problem. From what I found the twist rate for Uberti is 1/20.