Guys I give you the .277 Wolverine. This is a new round formed from 5.56 brass necked up to .277/6.8 and trimmed to 1.535 developed by Mad Dog Weapon Systems (MDWS) who is offering barrels and custom Hornady dies. I have been following it's development on the 68Forums for a while now and decided to put a 10.5'' barrel on order and obviously a set of the Hornady dies. The 16'' barrels are already in the hands of some customers and the performance is looking great. I'll post links to info and user findings for anyone that is interested until I can get my barrel and post my own testing. This will be my first cat and first AR pistol build, so far it's been a blast. More to follow over the next few weeks.