the fact that your not having any luck with your calls may not be the calls fault but rather your fault.are your using it properly???just about any call made today will work on any predator this is why i say maybe its you.i have at least 20 different calls and a elec caller,all of them work ,none of them work all the time.i have calls made by ej-sceery,lohmann,johnny stewart,verminator,olt,woods wise,quaker boy,penn woods,burnham bros and problably more.my personal favorites are ej sceery,verminator and quaker boy,not nessasaraly in that order.the verminators are open reed calls as is two of my sceery calls.the rest are closed reed or variable pitch calls.i guess if i had to pick a favorite it would be the verminators,there real sweet.