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Apr 26th, 2024
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Joined: Apr 2002
Posts: 6,812
Sidelock
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Sidelock
Joined: Apr 2002
Posts: 6,812 |
Mine was the old Orlen "Choke & Chamber Music" chart. Isn't that cute? Gives 6 and 14 pts. as the familiar IC/MOD in 20 ga. Personally, I also think all 20s should be choked fullnfull so one can go about missing with full confidence that one has a concentration which will kill.
jack
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Joined: Jan 2002
Posts: 3,642 Likes: 1
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 3,642 Likes: 1 |
Sorry Raimey:
-"Gough Thomas's GUN BOOK
Shotgun lore for the sportsman"
G. T. GARWOOD
M. SC., F.I.C.E., F.I.E.E.
Chartered Engineer
ADAM & CHARLES BLACK
LONDON
ISBN 0 7136 1008 5
-"Gough Thomas's Second Gun Book
more shotgun lore"
ADAM & CHARLES BLACK
LONDON
ISBN 0 7136 1265 7
Hope this helps. There are other books by Mr. Garwood, but these are the ones I have on loan at the moment. Pertinent articles in them include:
-"Fallacy of choke"
-"Choke versus cylinder-permissible aiming errors"
-"Choke-a neglected aspect"
-"How choke works"
-"Mysteries of choke (I)"
-"Mysteries of choke (II)"
-"What is my choke?"
And several others on ballistics, patterns, range; all very enlightening (to me at least).
I should mention that I finally measured (and patterned) my son's model 53 16bore AyA and the Galazan choke gauge I used would not go in in either of the barrels. As far as the shooting we usually do, it is really a handicap to have such a gun that was surely made for live pigeons. It needs opening up asap, and I would choose .004 & .017 (using the "Choke & Chamber Music" chart as reference)
JMTC
JC(AL)
Last edited by JayCee; 09/17/07 06:00 PM.
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
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Joined: Apr 2002
Posts: 6,812
Sidelock
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Sidelock
Joined: Apr 2002
Posts: 6,812 |
JayCee, was the major bore in the 53 .667" or a few thou under?
jack
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Joined: Feb 2002
Posts: 3,205
Sidelock
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Sidelock
Joined: Feb 2002
Posts: 3,205 |
How good are you with a shotgun?  Good enought.
Ole Cowboy
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Joined: Jan 2002
Posts: 428
Member
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Member
Joined: Jan 2002
Posts: 428 |
Hey Guys, its a Sterly, not a Purdy....
If I were you, I would send it to Orlen for a set of choke tubes.
Then you will have one shotgun you can use for everything. You will use the gun more, and never worry about not having the right choke. The worst that will happen is your kids may get a few hundred less when they sell it, a month after your funeral. In the meantime, you will have used and enjoyed the gun.
I have three SxS's with choke tubes, and haven't yet been struck by lightening.
JERRY
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Joined: Aug 2007
Posts: 59
Sidelock
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Sidelock
Joined: Aug 2007
Posts: 59 |
I am still on the steep side of a learning curve about these guns but I thought that the pattern of a shotgun was determined not just by the restriction of the choke but also how the shot entered the choke and the loads used. I keep hearing restriction stats but nothing about taper into restriction, overboring, length of choke etc. Is choke boring even an absolute science?
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Joined: Jan 2002
Posts: 3,642 Likes: 1
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 3,642 Likes: 1 |
Jack, the only available measure I have is what the barrels say: 16,8mm or 0.66141732" Oddly enough, the left barrel is marked as having 1mm (16,8 - 15,8) constriction and the right one only 0,1mm (16,8 - 16,7) , but the Galazan choke gauge would not go in. Comments? JC(AL)
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
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Joined: Apr 2002
Posts: 6,812
Sidelock
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Sidelock
Joined: Apr 2002
Posts: 6,812 |
Bored .006" under nominal in the bore, I would think most of the steps on the "full" [small] end would enter the choke if it's only choked .1 mm. What's a tenth of a sillymeter? Misstamped?
jack
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Joined: Jan 2002
Posts: 3,642 Likes: 1
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 3,642 Likes: 1 |
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
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Joined: Apr 2007
Posts: 28
Boxlock
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Boxlock
Joined: Apr 2007
Posts: 28 |
For what it is worth, I just had my 20ga Flues choked .003 & .010 for use as a Grouse/Woodcock gun. Shot skeet with it and RST's 2 1/2 dram 7/8oz #9's and really liked it. Need to hit the pattern board before heading to MI in a week and a half, but based off what I have seen it should fit my bill.
Dave
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