Flintlock - Drawbacks

Drawbacks

Flintlocks were prone to many problems, compared to modern weapons. Misfires were common. The flint had to be properly maintained, as a dull or poorly napped piece of flint would not make as much of a spark and would increase the misfire rate dramatically. Moisture was a problem, since moisture on the frizzen or damp powder would prevent the weapon from firing. This meant that flintlock weapons could not be used in rainy or damp weather. Some armies attempted to remedy this by using a leather cover over the lock mechanism, but this proved to have only limited success.

Accidental firing was also a problem for flintlocks. A burning ember left in the barrel could ignite the next powder charge as it was loaded. This can be avoided by waiting between shots for any leftover residue to completely burn. Running a lubricated cleaning patch down the barrel with the ramrod will also extinguish any embers, and will clean out some of the barrel fouling as well. Soldiers on the battlefield could not take these precautions though. They had to fire as quickly as possible, often firing three to four rounds per minute. Loading and firing at such a pace dramatically increased the risk of an accidental discharge.

When a flintlock is fired it sprays a shower of sparks forwards from the muzzle and another sideways out of the flash-hole. One reason for firing in volleys was to ensure that one man's sparks didn't ignite the next man's powder as he was in the act of loading.

An accidental frizzen strike can also ignite the main powder charge, even if the pan has not yet been primed. Some modern flintlock users will place a leather cover over the frizzen while loading as a safety measure to prevent this from happening. This also slows down the loading time, which prevented safety practices such as this from being used on the battlefield.

The black powder used in flintlocks would quickly foul the barrel, which was a problem for rifles and for smooth bore weapons that fired a tighter fitting round for greater accuracy. Each shot would add more fouling to the barrel, making the weapon more and more difficult to load. Even if the barrel was badly fouled, the flintlock user still had to properly seat the round all the way to the breech of the barrel. Leaving an air gap in between the powder and the round (known as "short starting") was very dangerous, and could cause the barrel to explode.

Handling loose black powder was also dangerous, for obvious reasons. Powder measures, funnels, and other pieces of equipment were usually made out of brass to reduce the risk of a static discharge which could ignite the powder. Soldiers often used pre-made "cartridges", which unlike modern cartridges were not inserted whole into the weapon. Instead, they were tubes of paper that contained a pre-measured amount of powder and a lead ball. Although paper cartridges were safer to handle than loose powder, their primary purpose was not safety related at all. Instead, paper cartridges were used mainly because they sped up the loading process. A soldier did not have to take the time to measure out powder when using a paper cartridge. He simply tore open the cartridge, used a small amount of powder to prime the pan, then dumped the remaining powder from the cartridge into the barrel.

The black powder used in flintlocks contained sulfur. If the weapon was not cleaned after use, the powder residue would absorb moisture from the air and would combine it with the sulfur to produce sulfuric acid. This acid would erode the inside of the gun barrel and the lock mechanism. Flintlock weapons that were not properly cleaned and maintained would corrode to the point of being destroyed.

Most flintlocks were produced at a time before modern manufacturing processes became common. Even in mass produced weapons, parts were often handmade. If a flintlock became damaged, or parts wore out due to age, the damaged parts were not easily replaced. Parts would often have to be filed down, hammered into shape, or otherwise modified so that they would fit, making repairs much more difficult. Machine-made, interchangeable parts only began to be used shortly before flintlocks were replaced by caplocks.