Hi everyone, I just purchased a Uberti 1885 High Wall chambered for 45-70 with the flip-up tang sight. I plan to use this rifle for some close and long range plinking. I'm interested in loading some 500gr Hornady FMJRN. My goal is to kick-up some dust at around 500-800 yards. My reloading manual dosent list this load, and I plan to buy the Hornady manual but havent got it yet. My question is this: is it safe to load this heavy bullet in the Uberti replica rifle I own, and if so, what is a safe starting load. Thanks.