"My mind is made up, don't confuse me with the facts".
This seems to be the prevailing philosophy.
Hopefully someone will answer Chuck's request
(but I honestly doubt the facts will come from the "engineers" out there).

I had the audacity to cite Mr. Bell's article in the 16ga. forum, when asking about this
same issue concerning my Manufrance Ideal prooved for "PRESSION 1100 KILOS".
I mentioned I was using 67mm shells loaded to CIP standards and received a sanctimonious
bashing for it.
To make a long story short, I was ostracised and frankly felt relieved.

JC(AL)

"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin