I would put my money on the Whitworth. As flash in the pan said, Gen. Sedgwick was reportedly killed by one though I have read it was from 800 yds. During the siege of Charleston, SC, Whitworth sharpshooters in riflepits in the sandhills in front of Battery Wagner. Capt. Ashe, commanding some of the sharpshooters there said,"I had been instrumental in having our agent in England, Major Huse, obtain for us some telescopes for rifles, and he sent besides half a dozen Whitworth rifles with telescopes affixed. Two were given to me. I had some sandbags removed from a wall (of Wagner), leaving two holes,at each of which a marksman with a Whitworth stood ready to fire. A hat raised on a ramrod drew the fire of some Federal sharpshooter, who then would look to see the effect, and quick would come the Whitworth bullet. Those guns were fatal at fifteen hundred yards." This is just one account. I have an excellent book about this rifle and it's users that lists many episodes. There is not enough space here to tell them all. Normally, open sights were used up to 800 to 1000 yards (you really have to have good eyesight for that)and above that range the Davidson telescopic sight was used up to about 1600 yds. Sharpshooters armed with these caused so many casualties at long range, Federal officers directed that counter-battery be used against individual sharpshooters. Kerr rifles were also very long range guns and were used with great effect, but I believe the Whitworth will always be the king of the long range plinkers.
:imo: :m2c:
I almost forgot. The Whitworth was .451 cal., hexagonal bore, 1 in 20" twist. Bullet sizes varied, but averaged about 530 grs. Some of the bullets were hex shaped to mechanically fit the bore but most were cylindrical. Also they were paper patched. Some had shallow cavities in the base, some were flat based. There is one variation that is double-ended (pointed on both ends). The powder charge varied from 70 to 85 grs. The recoil, especially when using a 560 gr. and 85 grs. of powder (FFFg) is punishing, especially when fired prone or from a bench. Sharpshooters were recognized by the black eyes they sported because they used little or no eye relief with their scopes. This gun has a peculiar ringing sound when it is fired, similiar to the sound of a brass field piece. It is both a joy and a terror to shoot. Unfortunately, I've never had the opportunity to try mine at long range. Okay, I'm done now. :yakyak: