Shawn,
Thanks !
I killed that billy on my 3 rd day huning alone in a rock canyon adjacent to the Russian Butte. I saw him across a canyon bedded down at 800 yards. I made my way thru a rock garden, and ending up blasting him at around 40 yards in his bed. He jumped up, and took 3 more hits from 7mm mag.
All I can say is pound per pound, there isn't a tougher animal in North America !

If you haven't got a tag yet, I hope you draw one. They are a blast to hunt!