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 Moderator on 17-Nov-2004 9:07 AM
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