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LOP translation between single and double triggers
Unread 08-12-2024, 10:45 PM   #1
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Default LOP translation between single and double triggers

Hello,

I had the chance to handle a Parker reproduction 20ga today that had a 14 1/4 LOP to a single trigger. It seemed to fit surprisingly well considering I usually prefer a LOP closer to 14 7/8.. I only own double trigger guns so im curious when you measure a single trigger gun how do they correlate?
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Unread 08-13-2024, 09:30 AM   #2
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The single trigger Repros position is at the location of the forward position of a double trigger gun effectively lengthening the LOP for the shooter.





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Unread 08-13-2024, 09:47 AM   #3
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Hmm.
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File Type: jpg single trigger repro.jpg (4.0 KB, 178 views)
File Type: jpg DT Repro.jpg (4.1 KB, 180 views)
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Unread 08-13-2024, 12:55 PM   #4
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Quote:
Originally Posted by edgarspencer View Post
Hmm.
All things being equal the wood on the single trigger gun should be longer by the amount of distance between the two triggers on the right hand gun.
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Unread 08-13-2024, 06:24 PM   #5
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Here’s what the authors of The Parker Story reported regarding LOP:

“Skeuse specified the pull length of the Reproductions to be 14 3/8 inches. Well, the Japanese made the guns exactly to that specification, but measured the pull from either the front trigger of two trigger guns or the single trigger of a gun so equipped. The single trigger on the Reproduction was located in the same position as the rear trigger on a two trigger gun. Thus, the single trigger Reproductions may have a pull length that is a little too long for some shooters.”

About 14-15 years ago, I had a 20ga. Repro with a single selective trigger that I had converted to double triggers. That conversion added 5/8” to the LOP.
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Unread 08-13-2024, 06:54 PM   #6
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I know I'm at least 120 years too late, but the only way to measure length of pull is from the middle of the butt to the rear of the trigger guard. The position of the triggers is of no consequence.
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Unread 08-13-2024, 10:24 AM   #7
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I usually allow about 3/4" longer effective LOP for a SST.
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Unread 08-13-2024, 10:25 AM   #8
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Oh well…





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Unread 08-13-2024, 11:31 AM   #9
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Thanks Bob, that is what I was asking essentially.
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Unread 08-13-2024, 12:01 PM   #10
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I am not a gun fitter and likely know less than others. However, this concept has always caused me to wonder.

My point is....if one had a proper fitting LOP with a double trigger gun is it common one would require a longer LOP if we changed it to a single trigger where the trigger had the same placement of the former rear trigger? I don't think I would go that route. I believe where I place my face on the gun in relation to the plane of the barrels would cause me more concern than the 3/4" manipulation of my trigger finger. My sense is placing my face further from the frame due to the placement of the trigger within the trigger guard space would seem to alter form more so from a geometry perspective.

This is not a statement, it is a question for those more knowledgeable.
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