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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Blew a Primer _ Analysis
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<blockquote data-quote="WildRose" data-source="post: 1389868" data-attributes="member: 30902"><p>If you can recover a shot bullet just measure the full length of the impressions made by the lands and subtract the total width of the cannelure grooves. That should give you pretty much the exact total length of the baring surface.</p><p></p><p>This can then be compared to the bearing surface of any slab sided bullet of similar weight/caliber.</p><p></p><p>I've got some factory Hornady 270gr SP's and could easily shoot one into a water trough and measure it if it would help. Steve could do the same with one of his and that might lead you in the right direction.</p><p></p><p>The greater the bearing surface the higher the pressures will be when comparing two bullets of similar weight.</p><p></p><p>Edit:</p><p></p><p>Ok got stuck on the .375 part of the equation and forgot about the .30 cal part.</p><p></p><p>I don't think I have any 200gr bullets in thirty caliber. The closest I'd have are the Peregrine 183's and ELDX in 220gr.</p><p></p><p>The ELD-X should be pretty close in length of bearing surface not accounting for the grooves.</p></blockquote><p></p>
[QUOTE="WildRose, post: 1389868, member: 30902"] If you can recover a shot bullet just measure the full length of the impressions made by the lands and subtract the total width of the cannelure grooves. That should give you pretty much the exact total length of the baring surface. This can then be compared to the bearing surface of any slab sided bullet of similar weight/caliber. I've got some factory Hornady 270gr SP's and could easily shoot one into a water trough and measure it if it would help. Steve could do the same with one of his and that might lead you in the right direction. The greater the bearing surface the higher the pressures will be when comparing two bullets of similar weight. Edit: Ok got stuck on the .375 part of the equation and forgot about the .30 cal part. I don't think I have any 200gr bullets in thirty caliber. The closest I'd have are the Peregrine 183's and ELDX in 220gr. The ELD-X should be pretty close in length of bearing surface not accounting for the grooves. [/QUOTE]
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Blew a Primer _ Analysis
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