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Hi Unregistered,
On July 29th, this site will be moving..! No, really - it's "moving" to another physical location - including servers, gateways, routers - everything - including my coffee cup...
So, from the date of July 29th through July 30 or 31 (shooting for these dates, but - as always, I'm at the mercy of my ISP who has to install the lines to the new location - and we actually get them running ;) ). But - this site, cloud servers and main web will be OFF LINE.
Now, please save these dates!! Please - don't be "that guy" who emails me on the 30th to tell me you "can't open the Parker Website". I'll already know it is offline - and also know that you are "that guy"...
I'll take this notice up and down over the next week or so - and leave it up during the final few days before shutting it off on the 29th..
John D.
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08-28-2018, 07:30 PM
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#1
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Member
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PGCA Invincible
Life Member
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Member Info
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Join Date: Dec 2008
Posts: 34,089
Thanks: 41,423
Thanked 38,187 Times in 13,848 Posts
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Quote:
Originally Posted by Frank Srebro
Reason being that ordinary Fox 20's generally have bores of about .615" diameter - but the 60-some known HE Grade Super-Fox 20's were typically overbored to about .625/626".
Why my 20 bore Sterly Ejector was made with .626" diameter bores and 41 points of choke in the left tube is anyone's guess.
With this as background I wonder what the bore sizes measure on yours? frank
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Just got around to measuring mine...
Right bore in beyond the 4” of choke taper is .620 and the left bore in beyond the 5 1/2” of choke taper is .622”
What does that tell you Frank?... if anything?
.
__________________
"I'm a Setter man.
Not because I think they're better than the other breeds,
but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture."
George King, "That's Ruff", 2010 - a timeless classic.
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08-29-2018, 08:01 AM
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#2
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Member
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Join Date: Jun 2009
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Quote:
Originally Posted by Dean Romig
Just got around to measuring mine...
Right bore in beyond the 4” of choke taper is .620 and the left bore in beyond the 5 1/2” of choke taper is .622”
What does that tell you Frank?... if anything?
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Dean, about 70% of the A H Fox 20 bore guns in my records have .615/616" bores, with a few outliers in the .617 to .620" diameter range. Many were measured using my current Baker bore mike which I've verified to be accurate, and others were done with two earlier mikes that had some +/- drift after being calibrated. Your bores are a little larger than typical but not that much so. Fox was buying barrel tubes from different specialty manufacturers and I'm sure the company ordered 20-gauge tubes within some range of tolerance on bore diameter. Fox also did the bore finish machining and on that note I've measured Fox guns with one bore (usually on the left) that was a few thou oversize relative to the opposite bore. It's my belief that such tubes were "reworked" by finishing oversize in order to remove machine tool marks such as a gouge or imperfection in the bore made during the first finish operation.
That 5-1/2" long choke is quite unusual in a Fox 20 bore and was probably done because of the very heavy choke constriction in the left tube. You might try patterning it some day with ducking size lead shot, maybe 4's or 5's.
frank
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The Following User Says Thank You to Frank Srebro For Your Post:
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