Tinman
2 posts
Nov 17, 2004
4:29 AM
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Does anyone know if the 22BR cartridge drawing is of the Remington case or Lapua case? The drawing in the 22br section of the site. From what I understand they are different in base size somewhat. I've been told that the Lapua brass is larger in the base area.
thanks
James
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Moderator
102 posts
Nov 17, 2004
9:00 AM
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Here's the 22BR drawing, which comes from Accurate Powder:
Here is Lapua's cartridge print, dimensions in mm:
On our unfired Lapua Brass, the actual width of the rim is .469" measured with calipers. The width of the case right above the extractor grove is just slightly under that--mabye .4684", but it is hard to get a more precise measurement with calipers because there is some case taper. That suggests the 22BR drawing is correct for Lapua brass, except the rim diameter is over-size. But note, the Lapua blueprint corresponds to a .47244" rim diameter, which is also wider than actual Lapua brass as measured (.469").
Last Edited by Moderator on Nov 17, 2004 9:07 AM
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Tinman
3 posts
Nov 17, 2004
11:10 AM
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I was wondering because I have some older Lapua 6br brass and it does not fit in my new 40xb 6BR Remington unless I run it through a redding small base die. But I just bought a new box of Lapua 6BR Norma brass and it fits just fine? But anyway I am building a 22Br and getting a barrel from Pac-Nor and was wondering what the 22br drawing was for Rem or Lapua which is 6BR Norma brass. Everyone says that there is a difference in case size at the bottom. So i'm just going to send Pac-nor about 5 dummy rounds of Lapua brass and have them cut me a 22br barrel for my Savage build. Thanks for all your help.
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