Each step past 225 gets you closer to the high end leathers..Knothide Leather which leathermakers use for Armor kits can't be successfully skinned until after 300, those kits give +8 Stamina to Chest, Hands, Legs, and boots, btw
Plus, when in Outland Skinning is a dream...took my level from 300 to 375 in 3 days of grinding (plus all the non-skinners leaving the pickin's for us)