Hello! I'm going to throw this out there as a novice mtn goat hunter (this is also my first year, I have the same tag). Longish muzzle (I've seen pics of mature billies with longer muzzles, although again this is one angle) and mass makes me believe it is a billy. I would agree that different angles would be helpful. The mass looks ok. Horn length- if extended would it run from the corner of the nostril to the eye, or farther? Based on the goats left horn I believe it is going to be just slightly past the eye, so maybe 9-9.5 inches. I'd say for this area it is a pretty good representative. You could use some editing software and take some straight line etc measurements... What do you think?