Welcome Jar, I also hunt about 80% public land. What I've found in the 24 years of chasing these feathered freaks is that you'll do a lot better with a med-high pitched call with a lot of rasp in it. Learn to talk to the hens and and not the gobblers. Fall and winter is the best time to learn hen talk, get out and listen to them without making any noise. The birds are your best teachers.
Good luck and safe hunting.
Dodge County NWTF Chapter
WI. Youth Turkey Mentor
*Safe Hunting Is No Accident*
It takes One Second to be Stupid, a Lifetime to be Safe.