If he is 1.5 he has genetics not like deer down here in South Alabama. Usually at 1.5 a buck is going to have a spike frame, maybe a brow tine or sticker. For that buck to have a 8 point basket rack at 1.5 you are working with some great genetics. I understand the whole "don't let the rack fool you", but you also take into account the rack as more information to help you age the deer. Some people try to be the "smartest person in the room", but forget to look at the rack as more information and not the end all be all. But to age your deer you would need to be familiar with the genetics from wherever the deer was killed. If that deer was killed down here he would no doubt be 2.5, deer just don't push that much bone their first rack down here. And his body doesn't really change alot from 1.5 to 2.5, at least not down here. Our target age is 4.5, me and the land owners around me try to just shoot the mature bucks so 4.5 is the ideal age range. But according on what your neighbors are doing is going to have a big impact on what you CAN do. The best thing is to try and make contact with them, ask them are you shooting young bucks, then they are going to say what do you think is "young", lol happens every time! But then you will have an idea of what you can and can't let walk. But congratulations on your first buck, you are hooked by now I would guess!?