Larry,
The .223 Coyote chamber was kinda funny.
40 Vmax were barely seated in the neck of the case!
Shot awesome though with 28 gr of H335 and for a long time.
I bet I put 5,000 rounds down range single loading them before I came up with the idea to lengthen the mag box after reading one of your posts! LOL
Sure took a lot of rounds to kill that hammer forged tube but man was it done!