I have shot yearling bull moose, ie: born in May and shot in October (5 mo. old) at 175 to 200 pounds. Their upper front leg bones at that age, are 2" in diameter & will stop a 270gr. Speer from a 9.3x57, 2,300fps - impact at 200yards.
Moose are excellent eating at that age, as-are their moms.