I am going to give you a different perspective. If you are a wilflife "manager", then you have a boss. I would suggest that you consult him/them with this question and not a bunch of hunters on the internet. These forums can be good source of info for someone like me who has his own place, but you are employed as a steward of someone else's wildlife. Before you go blasting away at every 6 month old spike you see, I would suggest getting your bosses perspective on spike management and 4.5 year old 8 points. JMO!