Well, as it turns out there seems to be a qlich in the Quick Load program. The program shows the 22 CHeetah at 50,763 psi and the 22-243 at 65,000 psi.
As it turns out, that load really isn't that hot for a 65,000 psi max. Anyway, since I made my brass out of Winchester 243, I simply used starting loads for the 22-243 AI which is close to the CHeetah.
I have shot three different loads using IMR 4064, 4350 and 4895. All of these are starting loads and are in the 3,900 fps range, but not over 4,000 fps using 55 grain Hornady bullets.
The rifle is remarkable, a 5 shot group at 100 is a hole measuring .385 and at 200 with no wind, grouping is at .520 using a 36 power Weaver.
There really is no reason to continue with load development, I'm happy with the velocity and accuracy.
I sure learned alot in these last 3 weeks, and this will be my only wildcat!

Matt