the newest incarnation of my defense rounds for my CZ-52. in the absence of actually being able to find defense rounds commercially that actually deform much or that will go through several layers of cloth without plugging up and punching through without any deformation at all was a flop.. these little buggers are like small grenades.
the picture is of a loaded aluminum jacket 85gr 7.62x25 Tok and one that was fired and passed through 5 layers of rip-stop material from 3ft away. the projectile passed through the 5 layers of rip-stop BDU material and then proceeded to go another 8 inches in wet newspaper...
the effects were more of a detonation than a controlled expansion. most people in the law enforcement and the ammunition world would call it catastrophic failure and would deem them unusable. im not one of those people. the idea is to transfer as much energy into the target without the danger to people standing downrange from the target.
the ammunition companies and feds would advocate a projectile that would penetrate 12-15in in ballistics gel and still hold entirely together. this in theory looks good, but in reality the tissues of the human body are only about 3-5 inches thick depending on BF% and if you factor in dead space between organs and internal cavity walls. a projectile that will penetrate 12-15 inches of solid material would over penetrate most people and harm innocent people downrange.. in reality, you want the projectile to enter and transfer all its energy in the first 10 inches as this is within the organ cavity for most people. it does no good to continue trying to transfer energy past 10 inches as for a smaller person this is already outside the body if facing head on or already past any vital organs for most people, you're just wasting energy that should have been dumped into vital organs.
theoretically the reason for the feds advocating the projectile to hold entirely together is to ensure proper ballistic testing of slugs found. it also makes it a PITA for the trauma doctors if pieces are strewn throughout the organ that is hit. plus if a projectile is reduced completely to shards then matching that projectile to a firearm is difficult if not impossible. they can get weight of projectile but not caliber or other needed information unless brass is found nearby. the reason for these rounds is because i want as much damage as possible to the target without the danger of over penetration and killing someone standing on the other side of the target like most so called "defense ammunition' for the 7.62x25 will do..
|
   
   
|
|
Reply With Quote
