Now that's interesting.

Teen wounded in accidental shooting at gun range

"The cartridge did not properly load into the rifle's chamber, but instead, lodged sideways in the ejection port with enough force that the bullet was discharged. When a full cartridge or spent casing gets lodged in the ejection port, it is commonly referred to as a stovepipe," the statement said.

I'd really like to see the final report on this one.