I once had a 64" 3 pc longbow that had carbon core limbs and a very pronounced hybrid profile. Its was extraordinarily fast for a #50 bow but the limbs were a little too efficient for me. The bow picked up 40% or 20lbs in the first 5-6" of draw. Because of this, the bow actually felt heavier than my #57 BW PLII, not to mention it wasn't as fast. I opted for the heavier bow that felt lighter and shot faster then the lighter bow that felt heavy due to the high early draw weight. So, in short, I do know exactly what is meant by a bow that feels heavy.