Oh my. Now that is a summary!
Excellent.
When I read the article, I did a speed read and hurried to the summary. Thanks for making it EZ to interpret Drew.
I just left a message for Mr. Armbrust about testing a 20ga load.
This is the load I am considering shooting in my 2-1/2" damascus Flues. My thought was to see if he is setup with a 2-1/2" chambered 20ga test barrel and see if he would be willing to test my 2-3/4" load in that barrel. That would take some of the guesswork out of the total pressure number. Still may be a bit of variation due to forcing cone shape/length.
Fun stuff!
AA hull
3/4 oz shot
Win 209 primer
14.5 20/28 Powder
CB 1075-20 Wad
7,200PSI
1 grain of powder up yields 1250FPS and 7900psi
Hopefully 1 grain down will yield 1150FPS and 6500psi
Then add 1000psi for short chambers and 7500psi
This caught my eye as well
It was not unusual to have 300-600 psi spread between shots
Bill
Last edited by ithaca1; 04/13/15 03:55 PM.
