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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Looking for insight on blown primers
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<blockquote data-quote="tmoxley" data-source="post: 2868148" data-attributes="member: 107288"><p>Here are the measurements requested:</p><p></p><p>Cartridge base to shoulder distance (I cannot gaurantee the new ammo is from the same lot as the fired ammo):</p><p>Cartridge base diameter:</p><p>-IMI new: 0.466</p><p>-IMI fired: 0.471</p><p>-FGMM new: 0.468</p><p>-FGMM fired: 0.470</p><p></p><p>Overall case length:</p><p>-IMI fired: 2.012</p><p>-FGMM fired: 2.020</p><p></p><p>Groove diameter:</p><p>IMI fired: 0.406</p><p>-FGMM fired: 0.405</p><p></p><p>Rim diameter:</p><p>IMI fired: 0.470</p><p>-FGMM fired: 0.469</p><p></p><p>Unfortunately I only have a set of calipers, so I don't believe I have the tools to measure the distance from the shoulder to the base accurately. Also I was unsure if you were looking for diameter of the rim and groove, or length of the rim and groove. I listed diameters because that's the measurements I could accurately take.</p><p>For what it's worth, when I place the brass side by side on a level surface there is no perceptable difference between the two in terms of where the shoulder starts.</p></blockquote><p></p>
[QUOTE="tmoxley, post: 2868148, member: 107288"] Here are the measurements requested: Cartridge base to shoulder distance (I cannot gaurantee the new ammo is from the same lot as the fired ammo): Cartridge base diameter: -IMI new: 0.466 -IMI fired: 0.471 -FGMM new: 0.468 -FGMM fired: 0.470 Overall case length: -IMI fired: 2.012 -FGMM fired: 2.020 Groove diameter: IMI fired: 0.406 -FGMM fired: 0.405 Rim diameter: IMI fired: 0.470 -FGMM fired: 0.469 Unfortunately I only have a set of calipers, so I don't believe I have the tools to measure the distance from the shoulder to the base accurately. Also I was unsure if you were looking for diameter of the rim and groove, or length of the rim and groove. I listed diameters because that's the measurements I could accurately take. For what it's worth, when I place the brass side by side on a level surface there is no perceptable difference between the two in terms of where the shoulder starts. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Looking for insight on blown primers
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