Well, I've never had anything like this happen before so I couldn't tell you if there's a technological term, but I've heard that this is a probability among all surplus ammunition to include the same stuff you may shoot through a Mosin-Nagant. Anyways, this happened while shooting my Yugoslavian M48, an 8mm mauser. I guess this is a great way to experience this without actually having to, by a first person through a GoPro. Wear eye protection my fellow gun enthusiasts!
![](https://i.ytimg.com/vi/_Dat-h-eCxo/maxresdefault.jpg)