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Rifles, Reloading, Optics, Equipment
Reloading
plastic flow of primer material
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<blockquote data-quote="Hugnot" data-source="post: 2972323" data-attributes="member: 115658"><p>Mr. Catbrain did not provide photos of the situation, so my conclusions are sort of fuzzy.</p><p></p><p>Looking at the Federal SDS for primers the entire primer was analyzed by weight including brass cup, anvil - alloy of copper & zinc. The tiny amount of nickel was included. The explosive mixture was lead styphnate with barium (oxidizer) & antimony sulfide (fuel)- this stuff was included in the SDS. A tiny amount of Nitrocellulose & Nitroglycerin was included for some reason that I expect was to include residue from double base smokeless powder blasted into the primer and included with the SDS analysis. Combining nitroglycerin with lead styphnate would be a disaster because of the huge difference in brisance/explosive velocities. I would not want to be near a brick of primers containing NG - nasty stuff having big "shattering" explosive effects.</p><p></p><p>Impulse is the term used to describe the duration of a force applied on an object, the longer the time the less effect. NG would make for a real frisky primer by shortening the force applied duration (commonly measured by area under curve described by pressure vs time). Hurts less to be pounded on with a fat boxing training glove vs. a light glove.</p><p></p><p>Stuff happens, my guess is the factory 7 mag round was head-spaced on the belt dimension that was or should have been easily maintained. Was the primer extruded? If so, the brass in the primer cup might have been inadequately work hardened - just guessing - not enough info. Factory ammo recalls happen.</p><p></p><p><strong>Safety Recall Notice for 28 Nosler 175gr AccuBond Long-Range Trophy Grade Ammunition </strong></p></blockquote><p></p>
[QUOTE="Hugnot, post: 2972323, member: 115658"] Mr. Catbrain did not provide photos of the situation, so my conclusions are sort of fuzzy. Looking at the Federal SDS for primers the entire primer was analyzed by weight including brass cup, anvil - alloy of copper & zinc. The tiny amount of nickel was included. The explosive mixture was lead styphnate with barium (oxidizer) & antimony sulfide (fuel)- this stuff was included in the SDS. A tiny amount of Nitrocellulose & Nitroglycerin was included for some reason that I expect was to include residue from double base smokeless powder blasted into the primer and included with the SDS analysis. Combining nitroglycerin with lead styphnate would be a disaster because of the huge difference in brisance/explosive velocities. I would not want to be near a brick of primers containing NG - nasty stuff having big "shattering" explosive effects. Impulse is the term used to describe the duration of a force applied on an object, the longer the time the less effect. NG would make for a real frisky primer by shortening the force applied duration (commonly measured by area under curve described by pressure vs time). Hurts less to be pounded on with a fat boxing training glove vs. a light glove. Stuff happens, my guess is the factory 7 mag round was head-spaced on the belt dimension that was or should have been easily maintained. Was the primer extruded? If so, the brass in the primer cup might have been inadequately work hardened - just guessing - not enough info. Factory ammo recalls happen. [B]Safety Recall Notice for 28 Nosler 175gr AccuBond Long-Range Trophy Grade Ammunition [/B] [/QUOTE]
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Reloading
plastic flow of primer material
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