I have five different load data books and Varget is listed in most of them. The Hodgdon book also lists CFE 223 and several others. I use CFE223 for my AR 15 rifle with good results but it would not fill the case up like Varget. I have a large powder order coming in next week which will include N133. I'm sure others have tried Varget. Everyone tells me N133 is the go to powder.
OK Nick...... I'ma say this real careful......"That Gun Is Not Designed For Reloading Manuals"
Ain't NO MANUAL, No Where, No How gonna' go where that gun goes......
Varget is 'wayyy down the speedchart from the true PPC powders. You want to try an off-the-shelf powder try H322 (similar to VV130) and while it's not "PPC Specific" like 133 it's actually in the burn rate where you can make 'er BARK!
You've got a serious hotrod there....