two sources for judging moose:
1. Is this Moose Legal? video by ADFG. Check out their website and view this one for free:
http://www.adfg.alaska.gov/index.cfm?adfg=moosehunting.resources
2. Our video: Hunting Alaska's Terra Incognita the second disc in this video has a lot of up close footage of legal and sub legal bulls for seeing character traits and such. We don't say, this moose is legal or sub-legal because it didn't matter for us in this area...but, great footage so you can compare moose.
http://www.pristineventures.com/products/dvd-library.html
Good luck.
I agree with Ray on his points. A bull standing broadside with head turned, look for his antler tip to reach behind the shoulder hump...he's legal. Otherwise, no.
If his antlers look like they grow up more than lay flat, he's likely under 50". If they lay out flat and look 50" or better, wait for him to turn broadside and grunt or cow call to turn his head for the hump test.
larry