The only really good info that I have seen was from a German deer park where each male was photographed each year until full maturity or culling. In that Park the stags were from 10 to 13yrs when they produced their best heads. There is a marked change / improvement in the antler heads of stags as they enter physical maturity (5yrs). When they are young ( up till four ) they are growing their frame and filling out at the same time of year they are growing antlers. Once mature the antlers improve markedly because much more of the feed intake can be channeled to antler growth. We are seeing that exponential improvement now in stags not shot last year.
On NZ deer farms animals bred to supply the trophy park industry will produce their highest scoring head at 6 or 7 and their heaviest head around 9 or 10 years. As they age the tines shorten and thicken reducing score but increasing mass.
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