Was going through a bucket of my Grandpa’s old bullet collection and came across a 30cal .222. I thought it was a 300 blackout at first glance and wondered how it made its way into the bucket. I remembered there being a few odd ball cartridges in there and sort of remembered this one. Anybody aware of any 30cal .222 wildcats in the late 80’s early 90’s? Was he just before his time on the development of a 300blk but left this world before it could gain traction?