To answer your last attempt, brisance is the measurement of shock produced by different explosives and it doesn't relate to shotgun primers.
Primer makers use different primary explosives in admixture with sensitizers and other compounds to produce the temperature, duration and amount of hot gas they target for their product. Those are the important parameters. I doubt the ballistics labs would release specifics on their primers and even if they did, that laymen would be able to decipher and compare one against the other.
I wasn't the one who coined that term for shotgun primers. It has been used to refer to the "hotness" or "coldness" of primers for as long as I can remember. And, just to address this further, here is a email I received today from Ballistic Products, who
does operate a ballistics lab.
"Hi Stan,
Thank you for your interest in Ballistic Products and your inquiry. In most instances, Cheddite primers are comparable to Winchester, CCI, and Nobel Sport primers. However, how each primer interacts with a particular powder can vary greatly among types. I have attached an article with some additional information on primer
brisance and the effect on pressure. There is also some helpful information at this link as well:
https://shotgunreport.com/2016/02/03/shifting-primer-strength/. I hope this information helps. If you have any questions or would like to place an order please e-mail me back or call 1-888-273-5623 and thanks again.
Sincerely, Eric"
I highlighted the word in red, but note that it was he who wrote it. Feel free to correct him, and the rest of the world who understands what is meant when the term "primer brisance" is used. This layman will muddle on in ignorance.
SRH
