The AMP gray elk diaphragm is a great all around call with excellent volume. This is a single reed that produces medium to mature cow sounds, along with producing medium to large bull sounds.
Product Comment:
"I used this call almost exclusively this last September. This is one very versatile call and produces excellent volume for piercing the winds where I hunt. Called in more than one bull into several different setups and brought a few in from 700-1000yds away."