If you can find a copy of PRINCIPLES AND PRACTICE OF LOADING AMMUNITION copyright circa 1954, it goes into great detail on how cases are charged with powder. It also told why we went from drilling flash holes to the punched method use today. It was because it was for faster production during WW2. It's been long out of print and much is rather dull in places but educational. It even goes into measuring case expansion to determine max loads, but in a different way. My copy is rather beat up and still cost $100 on the used book market over 20 years ago.
Paul B.


Our forefathers did not politely protest the British.They did not vote them out of office, nor did they impeach the king,march on the capitol or ask permission for their rights. ----------------They just shot them.
MOLON LABE