I have several 45/70s at last count over a dozen, mostly Remington rollers. Several of these have been rebarreled over the years, and have great bores, but very short throats, with riflling starting 1/4" in front of the case mouth. It makes it hard to correctly seat and shoot anything but the shorter 300-350 gr cast slugs, and most of my shooting for longer range, out to 700 yds, is with 405 or 500, and 550 gr postells. Anybody have any experience with this, was thinking I could get a finish reamer with a longer taper on the throat and do it by hand, I have hand finish reamed several bolt actions with barrels that required that, and usually 4-5 complete turns is all it takes. Any recomendations on where to buy/rent a reamer is appreciated.