for the reasons you stated you do need some volume.the only reason i ask is becouse alot of folks think you need mass volume to work in predators,the truth is you need very little volume.the loudmouth caller is deffinetly one to look closely at.as of about 3 weeks ago or so the loudmouth still wasn' t availible to the public,but it very well maybe by now.i kooked at the specks on this caller on some link i got somewhere(most likley from here)and it looks very promising.but theres no dought that it will be pricey.