125 or 145 gr ??? I currently have 145 grain points in the heritage 350's at 30 in long with 5" sheild cut feather and a wrap. But I notice alot of other using 125 gr broadheads. Is it possible to be too heavy. I am shooting a bear Kodiak Mag 55lbs at 28 " the bow is 52" long. I figured heavier for better penetration......is this correct??