Hello all,
I am working on getting some dummy rounds made for a wildcat project and I was wondering if anyone could give me some advice.
My project is a 7mm blaser magnum (chosen because I could get quite a bit of norma brass in this chambering, other brass would work as well for this case) cut off at the shoulder (1.8 inch) and then stuffed with a .510 projectile. It looks like it will be close to a .540 cylinder chamber.
Before I can get anywhere, I need to open the neck up for the 510 bullets. The inner diameter of the neck is right at .480 right now. I figured if I could get the neck up to the correct inner diameter, I can just fire the rest and the I will just do my resizing for neck tension with a bushing die of some kind.
Any advice on how to open it up to .510 diameter?
Thanks
Nate