The next development was the wheel-lock. This was produced in Germany early in the i6th century and was used first with sporting weapons and pistols. In it, the cock was armed with pyrites, which, when lowered, pressed against the serrated edge of a steel wheel projecting through the bottom of the priming pan. When the trigger was pulled, the wheel revolved and sparks were struck, which ignited the priming in the pan. Thus was eliminated one component, i.e., the match, so subject to the effect of damp.
Like the wheel-lock, rifling (Ger. riffeln, to groove) , of the barrel was introduced early in the i6th century, some attributing the invention to Gaspard Koller, a gunmaker of Vienna, others to August Kotter, an armourer of Nuremberg. The advantages derived from spinning a projectile had been known from early times, but in those days difficulty in applying the principle to fire-arms was appreciable. Spiral grooving would spin a ball if the ball were gripped by it firmly from breech to muzzle. How ever, as the powder was foul and made of impure ingredients, it left a crust in the bore after each shot was fired, which neces sitated the use of a ramrod to drive the next ball home into position against the charge. This was a laborious process and caused delay, so although rifling came into use on the Continent for sporting weapons, and pistols, etc., for target purposes, where accuracy was more important than rapidity of fire, many years passed before any material success attended it.
Not until about 150 years after its invention was the wheel lock superseded by what eventually became the flint-lock. It also had a cock holding pyrites, and when the cock fell this struck against a piece of steel, throwing sparks into the priming pan. Flint was substituted for pyrites, in or about the year 1600, and the flint-lock approached its perfection when it was made so that the cock in falling not only struck the necessary sparks but simultaneously uncovered the priming pan which had up to that moment been protected against accidental dispersion and the weather. Later the flint-lock was adopted by the British army and this was the weapon in the hands of the troops not only dur ing Marlborough's campaigns, but also those of Wellington.
and, though they are represented by the 6oth King's Royal Rifles, the senior rifle corps in the British army is the Rifle Brigade which was raised in 1800 as the 95th Regiment, and armed with a flint-lock weapon known as the "Baker rifle," weighing 92 lb. The barrel was 3o in. long, the bore .625 with seven grooves, making one quarter turn in its length. and sighted for loo and 200 yards. Baker was a gunmaker in Whitechapel. A wooden mallet was at first supplied to force the ball down the barrel, which was loaded with great difficulty.