Almost all 2 year old bucks will score below 125. They are fairly easy to identify since they look so young. They will weigh about 165-180 pounds as well.
A 3 year old will show lots more mass and weigh about 200 pounds.
A 130 class buck will be outside his ears, have 4-6" brows, 8-10" G2's, 4-6" G3's and beams about 22-25".
The buck below scored 134" gross and was taken last year in Pike. He was 3 years old.
Good luck!