Points have nothing to do with age. Some bucks are 8ptrs when they have their first set of antlers at 1.5yrs old. There are small 8s, medium 8s & sometimes "Oh My Gosh" 8s!

Determining age "at first glance/on the hoof" takes practice & even then is rarely 100% spot on accurate.

http://www.qdma.com/articles/aging-bucks-on-the-hoof

http://www.agingdeer.com/