Several reasons may account for reloading fired cases. For amateur, casual or weekend shooters, reloading may not be an economic factor but rather a personal hobby because it takes longer time and more labor to reload. On the other hand, professional shooters choose to reload for a modified performance, such as increasing the velocity by adding more powder for a deeper penetration. Some target shooters might want to increase accuracy by using a special type of gunpowder for best “shot-to-shot consistency.”
Of course, the last category of reloaders or users is those who want to reload so that original extractor and ejector marks become more difficult to trace and compare. In reality, several real cases have indicated that criminals today have already begun such attempts in using reloaded pistol cartridge cases to divert police in their criminal investigation.
https://www.omicsonline.org/open-ac...n-2157-7145-1000344.php?aid=81418&view=mobile
For me, the above is an indication that they have shell casings from a crime scene and hope to match them to markings made by the reloader.
As I was reading the article, I became very excited about a few things. One thing that really got me excited was learning that a shell casing that has been reloaded could have markings caused by more than one weapon. So, for example, if someone used an unregistered weapon to shoot someone by used a reloaded bullet that had been previously fired from a known registered gun, that could link the person who owned the registered gun to the unregistered gun.
Also, I am surprised to learn just how much work goes into reloading a bullet. It's a process that requires a lot of tooling, and that tooling may produce some evidence that could link the bullet casing to the reloading apparatus.
Usually, bullets that are reloaded are limited to 40, 44 and 9 mm. Does anyone know if any of those weapons were used in any of the unsolved murders?