alinwa,
With 30,000+ #35 primers on hand,I'm good for the time being(<$60/500 <$300/2500)
50BMG flash holes are .125"/1/8" diameter.
50BMG primers weigh approximately 20grains, other centerfire primers weigh approximately 1 grain.
The LRMag primer sleeve may need to be a cup w/ .075" flash...