I have a couple of 30mm dummy rounds from which you can pull the projectiles if you get into handloading for it. I would start with 1800 grains 4831 and work up. (Two of my BIL's worked at Fairchild on the A-10 project.)
"You can lead a man to logic, but you cannot make him think." Joe Harz "Always certain, often right." Keith McCafferty
