A question on my 1912 DWM....

John Holbrook · 11-20-2002, 09:49 PM

What is the number, 8,84 on the barrel below the serial number.

Edward Tinker · 11-20-2002, 09:59 PM

The marking is the inner bore diameter, and I think it is land to land.

From a previous posting

[quote]the 8,82 indicates the bore diameter or the distance from the top of one land to the top of an opposing land...<hr></blockquote>

So you will see 8.83, 8,82, etc on guns.

John Holbrook · 11-20-2002, 10:03 PM

I think I have it figured out. 9MM bore is .354 and if I multiply .884X4 it comes out .3536 so the number is the bore size....

Thor · 11-20-2002, 10:13 PM

The 8.84 mm is the lands diameter, like Ed said and converted to inches is 0.348" A .355" diameter bullet corresponds to 9.017mm groove diameter. The multiplier is not exactly 4 it is 1/.254=3.937 When you show these diameters to 3 decimal places, you also need to use the multiplier to that many places also.

Pete Ebbink · 11-23-2002, 12:24 AM

p.s. Europeans use a "comma" whereas we Yanks use a "period" in their metric measurements...

Regards,

Pete... <img src="graemlins/yltype.gif" border="0" alt="[typing]" />

11-23-2002, 04:55 AM

11-20-2002, 09:49 PM	#1
John Holbrook RIP Join Date: Nov 2002 Location: Bellingham, WA. Posts: 109 Thanks: 0 Thanked 0 Times in 0 Posts	A question on my 1912 DWM.... What is the number, 8,84 on the barrel below the serial number. __________________ "Give me a fast ship, and I will sail in harms way!", John Paul Jones

11-20-2002, 09:59 PM	#2
Edward Tinker Super Moderator Eternal Lifer LugerForum Patron Join Date: Jun 2002 Location: North of Spokane, WA Posts: 15,935 Thanks: 2,034 Thanked 4,533 Times in 2,093 Posts	The marking is the inner bore diameter, and I think it is land to land. From a previous posting [quote]the 8,82 indicates the bore diameter or the distance from the top of one land to the top of an opposing land...<hr></blockquote> So you will see 8.83, 8,82, etc on guns. __________________ Edward Tinker ************ Co-Author of Police Lugers - Co-Author of Simson Lugers Author of Veteran Bring Backs Vol I, Vol II, Vol III and Vol IV

11-20-2002, 10:03 PM	#3
John Holbrook RIP Join Date: Nov 2002 Location: Bellingham, WA. Posts: 109 Thanks: 0 Thanked 0 Times in 0 Posts	I think I have it figured out. 9MM bore is .354 and if I multiply .884X4 it comes out .3536 so the number is the bore size.... __________________ "Give me a fast ship, and I will sail in harms way!", John Paul Jones

11-20-2002, 10:13 PM	#4
Thor User Join Date: Jun 2002 Location: Rio Rancho, New Mexico Posts: 4,583 Thanks: 958 Thanked 970 Times in 276 Posts	The 8.84 mm is the lands diameter, like Ed said and converted to inches is 0.348" A .355" diameter bullet corresponds to 9.017mm groove diameter. The multiplier is not exactly 4 it is 1/.254=3.937 When you show these diameters to 3 decimal places, you also need to use the multiplier to that many places also. __________________ Thor's Luger Clinic http://members.rennlist.com/lugerman/ Ted Green (Thor Yaller Boots) 725 Western Hills Dr SE, Rio Rancho, NM 87124 915-526-8925 Email [email protected] ----------------------------------- John3:3 Jesus answered and said to him, "Most assuredly, I say to you, unless one is born again, he cannot see the kingdom of God."

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11-23-2002, 12:24 AM	#5
Pete Ebbink User Join Date: Jun 2002 Location: The USA Posts: 5,919 Thanks: 0 Thanked 6 Times in 4 Posts	p.s. Europeans use a "comma" whereas we Yanks use a "period" in their metric measurements... Regards, Pete... <img src="graemlins/yltype.gif" border="0" alt="[typing]" />

11-23-2002, 04:55 AM	#6
tacfoley Guest Posts: n/a