Re: belted mag resizing die
The problem comes after you reload a belted case 2 or 3 times. The pressure ring (just above the belt) fails to get reduced by ANY conventional resizing die, and it becomes too tight to chamber properly (sometimes impossible).
It doesn't matter if you full size, neck size or whatever. Your belted cases are never getting resized at the pressure ring, and eventually they will stick in your chamber. You don't have to try your handloads in another rifle to see this happen.
This can best be proven by measuring your case diameter at the pressure ring. Most shooters never measure this area, and they rarely count the "exact" number of times they've reloaded their cases. One day they will wind up at the range and find that their handloads won't chamber. I've seen many shooters that could barely close their bolt because of this.
The U.S. Secret Service was one of our first customers, and the Belted Magnum Collet Resizing Die is now used all over the world by more than 1,300 customers.