At a review they demonstrated how, with their long-barreled rifles, a frontier weapon made in Pennsylvania and largely unknown in New England, they could hit a mark seven inches in diameter at a distance of 250 yards, while the ordinary musket was accurate at only 100 yards or so. It was “rifling”—spiraled grooves inside the long barrel—that increased the accuracy, and the new men began firing at British sentries with deadly effect, until the British caught on and kept their heads down or stayed out of range.
