Ill be the devils advocate here a little bit. If you are trying to manage your herd on a small property like that, you actually do want to take out certain bucks and age is a key factor. Antler size and shape is certainly more than just something pretty to look at. It's also a sign of quality of genetics and health and food supply. You see a 4.5-5.5 year old buck sporting a little skinny 8 point rack, you want him out of the herd. But if he's kicking up a 140-150 inches you might just want him to go another year. Especially if all you have running around is weaker looking bucks. This year, concentrate on culling Does and taking maybe a 3.5 year old buck that doesn't look like he will sport much of anything. Take out the weaker genetics. Get your herd to a manageable level that your property can easily hold. Now, all this is also being said while not knowing what state you are in. Some states just have smaller bucks with smaller antlers and a 140-150 inch whitetail is considered a monster buck. Around here, that would be considered on the smaller side of acceptable while in Virginia most would be dancing and celebrating in the streets after taking a monster such as that.