Re: Modern Musket
Little bit from my pea brain on metal stress as it related to barrel manufacturing, this is how I understand the process
Residual stress in a barrel is another possible cause of inaccuracy.
Stress can be caused by the rifling process, as it is in button rifling (MK12), or can exist in the steel bar as it was received from the steel mill.
Stress in steel will tend to come out when the steel is either heated or machined. The heating of a barrel through firing it is often enough to allow some stress movement to occur.
In effect what happens is the barrel warps and is no longer "looking" where we thought it was. The bullets don't hit the target where they were intended.
If a bar of steel is machined while it contains stress, it will move. Often stress can be introduced by the forklift or workers carrying bar stock and allowing it to bounce.
Rifle barrels made using the hammer forge process contain a tremendous amount of stress. This explains why some barrels on mass-produced factory rifles will walk their shots as those barrels heat from firing.
Heat stress relief allows molecules to line back up to the original orientation that was forged in from the steel mill, before any type of sress was introduces from machining the contour, boring , button rifling or just plain mishandling of bar stock meant for use as a barrel....heated to the point of red in the steel
Little bit from my pea brain on metal stress as it related to barrel manufacturing, this is how I understand the process
Residual stress in a barrel is another possible cause of inaccuracy.
Stress can be caused by the rifling process, as it is in button rifling (MK12), or can exist in the steel bar as it was received from the steel mill.
Stress in steel will tend to come out when the steel is either heated or machined. The heating of a barrel through firing it is often enough to allow some stress movement to occur.
In effect what happens is the barrel warps and is no longer "looking" where we thought it was. The bullets don't hit the target where they were intended.
If a bar of steel is machined while it contains stress, it will move. Often stress can be introduced by the forklift or workers carrying bar stock and allowing it to bounce.
Rifle barrels made using the hammer forge process contain a tremendous amount of stress. This explains why some barrels on mass-produced factory rifles will walk their shots as those barrels heat from firing.
Heat stress relief allows molecules to line back up to the original orientation that was forged in from the steel mill, before any type of sress was introduces from machining the contour, boring , button rifling or just plain mishandling of bar stock meant for use as a barrel....heated to the point of red in the steel
