Trajectory and accuracy are two different things, and a high trajectory does not mean your rifle is inaccurate at any given range, just means that you must know the range exactly in order to get hits. There is an article in Precision Shooting at 1000 Yards where the author tries to replicate the famous Billy Dixon Shot using a C. Sharps 1875 chambered for a modern .40-65 made from .444 Marlin cases. The load was 20.0 grs of Accurate XMP-5744, Federal 215 primer, and a cast 400 gr semi spitzer bullet from RCBS mold # 40-400-CSA. The range was 1540 yards, and they got hits on a life size "human on horse" silhouette. The following year the shooting was done again with a .45-110 Sharps and a .50-90 Sharps. Interesting stuff!