Canuck is correct in terms of B&C the most widely used scoring system by hunters.

The only thing I might add is points/tines that originateon the mainbeamgrowing offto the sides of the main beam(instead of the straight up normal fashion)are also classed as abnormal or nontypical growth according to B&C.(I see canuck meantioned this, sorry. FYI, for a point or tine to be counted in B&C it must measure at least 1" in length.)

In terms of B&C scoring all deer are scored as typical but have a portion on the score sheet for abnormal growth input. If the animals has abnormal growth the individual can chose to add those points(score) in to get a non-typical score as well. This is usually done as suggested when advantegous, bare in mindthe min. requirement does increase with non-typical versions of the species. A hunter must chose which classification the deer will be entered if it meets or exceeds both min. requirements, as it can not be entered in both. Such cases aren't the norm but it can happen.