Not attempeting to throw a wrench into this debate, but the old timers use to plug the end of a gobbler bone w/ glue and then drill a hole to get the sound they liked.
Bill
I've never considered myself an old timer

but as I reflect on my age, I guess I may be. I've filled the ends of many gobbler boned wingbone calls with epoxy and drilled smaller holes for a higher pitch. I've been doing this for over 20 years. But, as Mark and others have said, a good wingbone caller can manipulate the sounds and pitches with controlling the amount of pressure used with which to call. That being said, I prefer the hen radius over gobblers or jakes. I guess a lot depends on what type of hunting you are doing, whether it be fall or spring. Also, as was noted earlier, in NC and SC, hen wingbones are hard to find. Luckily, I've got several friends in Va, Pa, and Ny that save hen wingbones for me to make into wingbones. Of course, I'm always on the lookout for more wingbones from any fall hunting states. Many years ago, I started making a free wingbone call for anyone that could supply me with six wings. They get a call and I'd have five to make for my business. That's worked out pretty good.
As far as strikers from gobbler bones, they make good ones. I've don't make a lot of them but the ones I do make are made with a corncob top. I use the dimensions given to me by Neil Cost. I do the same with snowgoose and Canada wingbones.
EZ hit the nail on the head when he mentioned the length of the call. This has much to do with the degree of pitch. You may not hear a lot of difference between a call that is 8.5" long as compared with one that is 8.25" long but play it against one that is 7.5" long and it is very discernible.
Fred