Be advised that loud usually comes with a cost in wind that may negate its value to you.
I'm thinking now of a MVP Butch over-bored for a fellow wanting "the loudest possible hunting call". After deciding something else would better suit his purpose, that fellow was nice enough to give the call to me, and I could hardly wait to see what our high and wide or super windy or rainy day open marsh ducks thought of it.
Turned out that it would, in fact, seem to break birds farther out than the standard bore MVP that's been my workhorse. But by the time I got most turned, I was too often too winded to stay on them as hard as need be long enough to truly break their original momentum to points elsewhere and would lose them to it. And there wasn't much point in breaking what I couldn't finish, so I've stuck with the standard MVP I have the wind to stay on from A to Z.
Your mileage may, of course, vary...
If you think I'm wrong, you might be right.