Wyoming .223 and .357 Mag now legal to hunt
Chronograph data from a hand loader isn't acceptable by WGFD standards. It has to be published data from a manufacturer (which I disagree with). Buffalo bore advertises their 180 gr hard cast load at 547 (I believe) foot pounds at 100 yards from a 5" barrel.
The discussion is now academic as the energy requirement will no longer exist so long as the cartridge is at least .35 caliber and 1.5" OAL.