Data on Luger barrel thread specifications

Norme · 04-18-2020, 08:11 AM

Hi Don,
"What keeps the barrels nice and tight" is the rifling's right hand twist. If anything repeated firing will slightly over tighten the barrel causing the front sight to move left and the gun to shoot right. That is the reason military Lugers had the famous "witness mark" stamped below the barrel.
Norm

DonVoigt · 04-20-2020, 10:21 PM

Quote:

Originally Posted by Norme

Hi Don,
"What keeps the barrels nice and tight" is the rifling's right hand twist. If anything repeated firing will slightly over tighten the barrel causing the front sight to move left and the gun to shoot right. That is the reason military Lugers had the famous "witness mark" stamped below the barrel.
Norm

That is the first time I've heard that explanation of the existance of the witness mark. Do you have a reference for that tidbit of information?

briskspirit · 04-21-2020, 09:25 AM

Quote:

Originally Posted by Norme

Hi Don,
"What keeps the barrels nice and tight" is the rifling's right hand twist. If anything repeated firing will slightly over tighten the barrel causing the front sight to move left and the gun to shoot right. That is the reason military Lugers had the famous "witness mark" stamped below the barrel.
Norm

Is this witness mark available only on military lugers? Because I have it on my M1906 commercial too.

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04-18-2020, 08:11 AM	#1
Norme Always A Lifetime Forum Patron Join Date: Jul 2009 Location: Colorado Posts: 2,417 Thanks: 226 Thanked 2,607 Times in 933 Posts	Hi Don, "What keeps the barrels nice and tight" is the rifling's right hand twist. If anything repeated firing will slightly over tighten the barrel causing the front sight to move left and the gun to shoot right. That is the reason military Lugers had the famous "witness mark" stamped below the barrel. Norm