Why shoot a nanny? I grew up in Golden and spent a lot of time on Quanella Pass. Used to catch a lot of cutts in Silver Dollar. There are some big billies in the area. Since goat tags in CO are so hard to come by they are essentially once in a lifetime tags.
I drew one for G13 in 2001 and hunted until I found a good billy. Mine went almost 10 inches. There is a picture on my photo album on my profile page.