Hey turkeystrut,
I've got a Lohman reed owl hooter and an HS Strut Palmer. The Lohman seems to be louder. I have a buddy that had the Mark Prudhomme and doesn't seem to be as loud, but I saw it make Missouri gobblers sound off when mine would not. I just got one the other day, haven't fooled with it much, but it seems like the reed might stick if i try to put too much air/back pressure on it. Either way, I've seen it work when my others didn't so it will be going with me in the morning. Also, it is only $10-$12.
Billy