Antlers are weird. I've only ever been able to monitor a few double beam bucks and two of them were completely normal the following year. The third one I was lucky to follow his entire life and currently he's what I'm pretty sure is 7.5yrs old.
He was a very normal 2.5yr old 8pt and half way through the season he got one of those big softball size lumps on his neck like a tumor. The next year at 3.5 the lump had shrunk down a bit but his left side was a double main beam. At 4.5 it almost normal again except the brow was separated from the beam. At 5.5 it turned into a split g2. At 6.5 a 2" flier off the back of the g2. And now this year at 7.5 it's a nubby thumb looking sticker on the beam like a tiny tine between g2 and g3. The malformation creeps further away from skull and gets less severe every year.