ORIGINAL: brushbustin
I dont know about pistol rounds in UMC but i shoot them out of my colt match target AR .223and it shoots them great and i have never had a jam or anything.And i just shot 100 rounds over the weekend...Maybe you just had bad luck and got a bad one..."nobody or nothing is perfect"
I think somehow, people are missing the point of this post. Its not to critiize or put down peoples choice of ammo.Or tell them not to shoot UMC's. So there is no need to debunk or tell me how well it does in your gun.
The point was, to warn that even UMC's which are lightly/weak loaded can have issues that can be dangerous. And if you have stovepipes, or jams, don't just keep on shooting. Stop, check things out. A pierced primer, for experienced reloaders know you have reached a critical level.
Hope this makes more sense now.