The best call is the one that gets you to your calling site undetected, it masks your scent, it makes sure that the coyotes are in the area your going to call, they it lets you see them before they see you.... I havent found one of those yet.....
Dont be fooled by the Predator Hunting Videos, you just dont plop down anywhere and coyotes come out of the woods... The biggest thing is being where they are... and I myself hunt the midwest... we have it alot tougher than our western friends do in my oppionion... We have less coyotes spread a whole lot thinner... Just keep at it... Lots of Scouting helps...
Keep calling.... You gonna have to call at alot of ground to get consistant results.
MIke
www.purepredator.com