It's always been my opinion that they grow almost right up until they shed the velvet, which is generally around the 2nd week of September, although it can definitley vary some. As far as whether or not they're all grown out by the Archery opener, I'd have to say my opinion is no. In Nevada, archery opens August 1...some bucks will still be a little "balled up" at that point! Here in Utah it's a couple weeks later and the bucks are pretty much there, although I'm sure they could add a little in the month or so between the Utah opener and when they shed velvet.