The original Pritchett design was modified by Col. Boxer, who reduced the diameter to 0.55 after troops found the original 0.568 too hard to load during the Indian Mutiny, changing the mixed beeswax-tallow lubrication to pure beeswax for the same reason, and added a clay plug to the base to facilitate expansion, as the original Pritchett design, which relied only on the explosion of the charge, was found to cause excessive fouling from too slow an expansion, allowing unburnt powder to escape around the bullet. The Enfield's adjustable ladder rear sight had steps for the default or “battle sight” range , , and . For distances beyond that, an adjustable flip-up blade sight was graduated (depending on the model and date of manufacture) from to . British soldiers were trained to hit a target by with a diameter bull's eye, counting 2 pointsout to . The target used from to had a bull's eye, with any man scoring 7 points with 20 rounds at that range being designated a marksman.