Some stone locks have been designed. The spiral grooves of the rifle make the rifles more accurate and give a greater effective range – but with a muzzle-loading weapon, they take longer to load due to the well-fitting bullet, and after repeated firing, the black powder tended to pollute the barrels. Military musketeers could not afford to take the time to clean their errands between shots, and the greater accuracy of the rifle was useless if the tactic was based on mass volleys. Most stone military locks were therefore smooth-core locks. Rifle-plated stone locks were used militarily by snipers, skirmishes and other support units; But most of the stone locks drawn were used for hunting. Stone locks were prone to many problems compared to modern weapons. Failures were frequent. The flint had to be properly maintained because a piece of blunt flint or badly nodded the head would not make as many sparks and would greatly increase the rate of duds. Moisture was an issue as moisture on frizz or wet powder prevented the weapon from firing.
This meant that stone castle weapons could not be used in rainy or wet weather. Some armies have tried to remedy this by having a leather cover on the locking mechanism, but this has had limited success.  Accidental shooting was also a problem for stone locks. A burning ember that remained in the barrel could ignite the next powder charge when loaded. This can be avoided by waiting between shots until the remains are completely burned. If you use the Ramrod to run a lubricated cleaning dressing through the barrel, it will also extinguish the embers and also remove some of the dirt from the barrel. However, soldiers on the battlefield could not take these precautions. They had to fire as quickly as possible and often fired three to four shots per minute. Loading and shooting at such a rate greatly increased the risk of accidental discharge. When a stone lock is pulled, it sprays a shower of sparks from the mouth forward and another laterally from the lightning hole. One of the reasons for firing salvos was to make sure that one man`s sparks weren`t igniting the next man`s powder when he was at the store. 2.
A handgun with a stone lock; In particular the old-fashioned musket of European armies and others. The Jezail was another example of a longstone castle rifle, but its use in Afghanistan, India, Central Asia, and parts of the Middle East was primarily a military weapon, so it tended to fire larger, heavier ammunition. Most stone locks were made at a time before modern manufacturing processes became commonplace. Even in mass weapons, the pieces were often handmade. If a stone lock was damaged or parts were worn due to age, the damaged parts could not be easily replaced. Parts often had to be filed, hammered or modified to fit, making repairs much more difficult. The machine-made interchangeable parts were only used just before the stone locks were replaced with locks. The French courtier Marin le Bourgeoys, shortly after his accession to the throne in 1610, made the first firearm with a real stone locking mechanism for King Louis XIII.  The development of firearm locking mechanisms over the previous two centuries had been from match locks to wheel locks to snap-on closures, snap-on closures, snap-on closures and miquelet, and each type had been an improvement and had brought certain design features, that were useful. The Bourgeoys combined these different features to create the stone locking mechanism. The new system quickly became popular and was known and used in various forms throughout Europe until 1630.
In particular, dragoons that served in the parliamentary army during the English Civil War were known to use Schnaphaunce muskets or early forms of stone locks. Examples of ancient stone castle arms can be seen in Rubens` painting « Marie de` Medici as Bellona » (painted circa 1622-25). Military castle stone muskets tended to weigh about ten pounds because heavier weapons proved too bulky and lighter weapons were not sturdy or heavy enough to be used in hand-to-hand combat.