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Joined: Nov 2015
Posts: 1,124 Likes: 19
Sidelock
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OP
Sidelock
Joined: Nov 2015
Posts: 1,124 Likes: 19 |
So heres my dilemma, I cant seem to find standard bore diameters for 20ga. Ive seen .614 (Japan).615 and .617. I have a Winchester 101 in 20 and want to measure the chokes but not sure which diameter was used by Winchester. I understand patterning different shots for different patterns. I'm just looking for numbers! Thanks guys!
Last edited by RARiddell; 07/25/17 08:00 PM.
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Joined: Feb 2008
Posts: 518 Likes: 4
Sidelock
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Sidelock
Joined: Feb 2008
Posts: 518 Likes: 4 |
Are you asking about 20 ga. in general or just Winchesters?
My take on it is that "standard" is kind of loosey-goosey. I have 20 bores that range from 0.616-0.627", and they come from three continents and span a hundred years of gun making. I see no commonality or pattern.
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Joined: Nov 2015
Posts: 1,124 Likes: 19
Sidelock
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OP
Sidelock
Joined: Nov 2015
Posts: 1,124 Likes: 19 |
Yes Winchester, specifically 101's
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Joined: Feb 2002
Posts: 1,558 Likes: 22
Sidelock
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Sidelock
Joined: Feb 2002
Posts: 1,558 Likes: 22 |
I've got an original 101 20 gauge made in 1963. I'll measure the bores and chokes tomorrow and let you know what I come up with. My gun is IC/Mod, but I've never actually checked the constriction and bore diameter. Will certainly do so tomorrow.
foxes rule
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Joined: Nov 2015
Posts: 1,124 Likes: 19
Sidelock
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OP
Sidelock
Joined: Nov 2015
Posts: 1,124 Likes: 19 |
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Joined: Jan 2002
Posts: 11,372 Likes: 103
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 11,372 Likes: 103 |
Strictly speaking, .627 would be a 19, not a 20. And so marked on the barrel flats of a lot of European guns. I had a 20ga Sauer from the 1930's, A&F import, that was overbored like that--and marked as a 19.
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Joined: Feb 2002
Posts: 1,558 Likes: 22
Sidelock
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Sidelock
Joined: Feb 2002
Posts: 1,558 Likes: 22 |
Really interesting. Bore diameter is .614. IC choke is .609 (.005) and Mod choke is .603 (.011). Always thought it was choked tighter then that. FWIW, I've killed a lot of doves using this gun over the years shooting over water holes and such. Guess those more open chokes didn't hurt me any for sure.
Last edited by tut; 07/26/17 08:07 AM.
foxes rule
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