Is there a website showing a "scale" of how to rate bucks? For example, the difference between a 120 class buck and a 150.

Just the scoring of B&c or P&Y

you mean a visual site with pics to compare them too?

It's just math..........Using the P&Y scoring system..... Once you've seen X number of deer, you begin to be able to quickly make a close guess as to score...........

That's gonna come with time man. You have to just see enough deer to know how to make the right guess.

Experience is the key to knowing the differnce.

A couple of things you can do to speed up your experience. Start trying to guess in your head the score of animals posted on this thread. Then look at their score. The official score card is oneplace to lookand there's been a couple of threads that actually asked people to guess score as well. If you want to look at the surreal level, watch monster bucks videos and guess the score of the deer they shoot. They usually post the P&Y or B&K score when the animal is retrieved. I'm not sure if the posted score is net or gross but it should help you get the idea of size.

A couple of pointers is that spread needs to be beyond the eartips and some decent mass and good length of tines for an eight pointer to scoreabove the 120" range.

Yes.

This may be of some assistance;

http://www.bowsite.com/BOWSITE/features/articles/FIELDJUDGING/WHITETAILS/