Quote:
Originally Posted by Joe Dreisch
With all of this talk of opening chokes on HD guns I got out my 1940 30" solid rib gun this morning and measured it. Bore is .730. Choke starts 3" from muzzle and ends with a 3/4" long parallel .693 at the muzzle (.037 constriction). Is that about correct for that era Heavy Duck?
Thanks, Joe
|
Joe, those parameters are typical for Model 12 Heavy Duck guns. Winchester put a lot of research effort into boring and chokes and was cautious (as compared with at least two other makers) in advertising 70 to 75% patterns for the Heavy Duck. That was with the 12 ga/3-inch 1-5/8 ounce load that essentially duplicated the heavy progressive 1-5/8 ounce loading in the "Short Ten".