I used to do the same thing till I found out that those big mama's will run my little bucks off of my food sources, now I take those big mama's and let the little ones feed.

To the question at hand, if I think it is mature (5 1/2 or older) I will shoot it if it has less than 8 points I try not to shoot anything under that age or that point total. However, I will shoot a spike or small four point if I know they are mature, I guess it just depends on where you live and the type of deer that you are accustom to seeing.