I have noticed a whistle with montecs also, but like mentioned before the strikers are quiet and very sharp. When testing broahead sharpness you should try cutting a rubber band that is stretched tight by gently sliding the broahead blade over it, if it take much force it needs to be sharper. Ive read that G5 uses a different angle on the montec blades that makes them more durable and hold the edge longer. A thick edge can get sharp but usualy not as shart as a thin one but it will last alot longer.