as I see it...
here in IL, a big buck at 2.5yo almost any hunter will take...
so taking out your best buck/genetics at 2.5yo before the rut/breeding season means, he only got to breed if he was lucky as a 1.5yo to spread on his genes...
most guys around here would never pass up a 2.5yo stud.
I've read some interesting articles on this the past few months.
a few key points I've read about are;
1. no buck breeder is buying spikes or forks for breeding, when 8-10pt 1.5yo exist...
2. taking out inferior bucks prior to the rut, and ideally studs post rut so they had a chance to breed, of course a 5.5yo buck has already passed on his genes by now so it matters less.
essentially around here a true trophy buck would be 3.5yo+ IMO.
so taking out inferior bucks before that, the easiest way to dot his is say 2 2.5yo bucks come in, and 1 is noticeably bigger but still not a shooter and 1 is even smaller, take out the smaller buck as a management buck.
some other concepts I read or studies have shown is that by 3.5yo if a buck is an 8pt, he will more than likely always be an 8pt.
also by 2.5yo if a buck doesn't have brow tines by now, he never will.
I plan to take out a management buck this fall prior to rut if I get the chance.
essentially you want your best bucks breeding, and then taken post rut. of course a perfect plan is just that, a plan. So good luck!
btw in my eyes, booners and world class deer are 10 or 12pt typicals, width, mass, tall tines, nice brows, big or normal, not small.