mcc: quote...

"you state 30 90 like it means something without context"

here is the context...

my old friend, teacher and guru, ed lander, now deceased, spent at least one summer in england, learning the skills and practices of some of the gunsmiths working in the birmingham gun trade...it was the general practice of some firms, not to work on guns in for repair unless they met certain safety standards...as to barrel wall thicknesses, the standard was at least .090 thousands of an inch in front of the chambers and a minimum of .030 thousands, seven or so inches down from the muzzles, which is often the thinnest place in the barrels, before the choke tapers begin...hence, the origin of my 90 30 guidelines for doublegon happiness...

Last edited by ed good; 10/13/22 01:09 PM.
keep it simple and keep it safe...