Ben- if you'll e-mail me at revdoc2@cox.net I'll send you choke constriction charts that Austin Hogan did for the Parker Pages, and therefore should not be reproduced without his permission.
Note Dave's 2" chokes are 16g
For a 12g Parker with a 4" full choke of .040:
From 4" to 2" - .010 constriction
From 2" to 1/4" - .030 constriction
From 1/4" to muzzle - parallel segment without constriction
And just to add to the confusion - I had a 20g Trojan with barrels shortened to 24" from 28" after a snow obstruction blow out that still had .003 constriction at the muzzle.
Last edited by Drew Hause; 05/17/10 07:56 PM.
