Interesting Range Day Find.

[RCS]

I was shooting some CCI long rifle in a 22 rim fire conversion kit installed in a Colt AR-15 Sporter when I heard a odd, different noise. As the long rifle cartridge was being started toward the chamber it went off ! The case bulged and bullet was found on top of the magazine after the bolt struck the loose bullet. Never seen anything like this before.Attachment 101246Attachment 101247