My attempts at trying to locate turkeys on the roost owling sounds more like an owl with a cockle burr in his throat. What are some of the better owling/locator calls available?

Keep practicing timber. Put your tongue on the side of your bottom lip like you have a big dip in. This will help the sound. Start off calling real soft and get a good sound, then gradually get louder. Start off with just one hoot. Barred owls hoot just onenote at times.It's just a lot louder thana Great Horned Owl.Your own voice will be louder than any produced owl call and you can control the volume better than you can with a call. You don't have to sound perfect to get a shock gobble. You should be able to give just one or two hoots to get responses from real owls. Then let them do the work for you.

like said you only need 1 or 2 hoots to get em goin. besides if your doin all that "who cooks for you" crap half the time you couldnt even hear the gobler anyway.
I only use one main cadence. "ah hooooo"

I use a Primos Owl Hooter

Real Name 4 in 1 Hoot Flute


Most times just one long blast!

here is the link
http://www.gamecalls.net/huntingproducts/primos3.html

JW