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Rifles, Reloading, Optics, Equipment
Reloading
Brass still good to go ?
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<blockquote data-quote="Jimm" data-source="post: 111748" data-attributes="member: 9"><p>I have been checking the extractor groove on a batch of Lapua brass as I marched it through several ladder tests with the tops of the ladders ( last 4 or 5 rounds ) being pretty stout . </p><p></p><p> After 4 firings I took the dial caliper to all the cases in this 50 lot and checked the primer pockets and ext. groove dimensions . 24 out of the 50 had expanded 5 thou in the groove and primer pockets are 2 thou under primer size . The other 26 are 2 to 3 thou larger in the groove than new and 3 to 4 thou smaller in the primer pockets than the primer .</p><p></p><p> I also checked the internal neck size after collet neck sizing with the Lee collet die . The necks are staying same as when first sized , that is , 4 thou under bullet size . This is true for all 50 cases .</p><p></p><p> Finally I sliced a case that was the most enlarged in the groove and primer pocket dimensions . Not having viewed cases before in this manner I would appreciate input on the pix I am hoping to attach to this post .</p><p></p><p> Bottom line is that I have been operating under a idea that when the groove dimensions are beyond 3 thou enlargement that the brass was likely to have case wall thinning to the point of separation . I don't know where or when I picked up this idea but I really don't want to throw away good brass . </p><p></p><p>Thanks as always guys , Jim B. [image]<img src="http://img.photobucket.com/albums/v632/hisgrace/fb52c30c.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />[/image]</p><p></p><p> Pic is pitimous cause my camera buff middle son isn't here to show me how to get the closeups in focus , this camera has more knobs sticking out of it than a sow that just had a litter . [image]<img src="http://img.photobucket.com/albums/v632/hisgrace/d12df829.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />[/image]</p></blockquote><p></p>
[QUOTE="Jimm, post: 111748, member: 9"] I have been checking the extractor groove on a batch of Lapua brass as I marched it through several ladder tests with the tops of the ladders ( last 4 or 5 rounds ) being pretty stout . After 4 firings I took the dial caliper to all the cases in this 50 lot and checked the primer pockets and ext. groove dimensions . 24 out of the 50 had expanded 5 thou in the groove and primer pockets are 2 thou under primer size . The other 26 are 2 to 3 thou larger in the groove than new and 3 to 4 thou smaller in the primer pockets than the primer . I also checked the internal neck size after collet neck sizing with the Lee collet die . The necks are staying same as when first sized , that is , 4 thou under bullet size . This is true for all 50 cases . Finally I sliced a case that was the most enlarged in the groove and primer pocket dimensions . Not having viewed cases before in this manner I would appreciate input on the pix I am hoping to attach to this post . Bottom line is that I have been operating under a idea that when the groove dimensions are beyond 3 thou enlargement that the brass was likely to have case wall thinning to the point of separation . I don't know where or when I picked up this idea but I really don't want to throw away good brass . Thanks as always guys , Jim B. [image][img]http://img.photobucket.com/albums/v632/hisgrace/fb52c30c.jpg[/img][/image] Pic is pitimous cause my camera buff middle son isn't here to show me how to get the closeups in focus , this camera has more knobs sticking out of it than a sow that just had a litter . [image][img]http://img.photobucket.com/albums/v632/hisgrace/d12df829.jpg[/img][/image] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Brass still good to go ?
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