If I were in CO I'd love to help with this.

Me and my buds are going to do something similar here in Oregon. We have some 12"x12" armor plate, plus various scrap steel.

Tentative plan is to include 100y offhand, 200y & 300y kneeling/seated/sticks, 500y prone, and 600y prone. Also thinking about a 100y mover (zip line) and longer ranges for those up for it (out to 800y or 1000y). Will score based on time and hits. It'll be pretty informal, and geared towards medium range hunting but should be a good time.

I'll be interested in hearing what you guys come up with for your course and scoring.

Jason