If they aren't mature, I let em go.
Seeing how you cant manage genetics on free range deer (especially buy killing bucks) and its impossible to tell the potential of a buck before he is mature....
I say NO! There is no reason to kill a young bucks for management purposes.
+1... There's so many environmental factors that can affect a year or two of growth. Until they can fill a freezer, I won't waste the tag.