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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Blew a Primer _ Analysis
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<blockquote data-quote="Pdvdh" data-source="post: 1391179" data-attributes="member: 4191"><p>.308 speeds? Yeah... right! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Our experience with the blown primers in the Hornady casings, versus Rich's testing and experience with the RWS brass, and other troubleshooting discussion in this Thread point to the extent to which a safe maximum powder load and operating pressure is so often heavily dependent on equipment and components. </p><p></p><p>We have no choice but to settle for a lower case pressure and MV to prevent gas blowback using the Hornady casing, compared to the RWS. RWS case capacity is less than Hornady, yet safely higher MV can we realized by operating with higher pressures. The cases are just that much stronger. </p><p></p><p>Some barrels build pressure faster than others. Some powders are more temp sensitive than others, and so on and so on...</p><p></p><p>There was scoffing earlier in this thread about running higher MV than some felt was reasonable. Top MV can vary quite a bit with any cartridge, wildcat or factory, depending on a multitude of affecting factors. It's complicated. Pressure specifications don't exist in code for wildcat cartridges by SAAMI or anyone else I'm aware of. We have a good idea where that operating pressure could become hazardous. Some use Quickload. We have to find the safe powder/pressure charge, understand it, respect, and then maintain it. It requires knowledge, and good judgement, practices, and procedures. Even in commercial cartridges with SAAMI specifications in place, the SAAMI pressure limits in those cartridges can, and often are safely exceeded by knowledgeable shooters who reload their own ammunition.</p><p></p><p>My feelings on standards, codes, and specifications established to protect human health and safety? If you don't understand the basis for them, whether it be electrical, plumbing, mechanical, foundation, structural, or <strong>reloading</strong>, ... better off to fully conform to the prevailing specs/codes. If you don't completely understand the why behind the specifications, say for example, SAAMI maximum cartridge operating pressures - be cautious. Maybe just purchase and shoot factory ammo.</p><p></p><p>Rant off... not really a rant. An observation based on years of observation of my own reloading and shooting mistakes (and in other areas of life), and those of others.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1391179, member: 4191"] .308 speeds? Yeah... right! :) Our experience with the blown primers in the Hornady casings, versus Rich's testing and experience with the RWS brass, and other troubleshooting discussion in this Thread point to the extent to which a safe maximum powder load and operating pressure is so often heavily dependent on equipment and components. We have no choice but to settle for a lower case pressure and MV to prevent gas blowback using the Hornady casing, compared to the RWS. RWS case capacity is less than Hornady, yet safely higher MV can we realized by operating with higher pressures. The cases are just that much stronger. Some barrels build pressure faster than others. Some powders are more temp sensitive than others, and so on and so on... There was scoffing earlier in this thread about running higher MV than some felt was reasonable. Top MV can vary quite a bit with any cartridge, wildcat or factory, depending on a multitude of affecting factors. It's complicated. Pressure specifications don't exist in code for wildcat cartridges by SAAMI or anyone else I'm aware of. We have a good idea where that operating pressure could become hazardous. Some use Quickload. We have to find the safe powder/pressure charge, understand it, respect, and then maintain it. It requires knowledge, and good judgement, practices, and procedures. Even in commercial cartridges with SAAMI specifications in place, the SAAMI pressure limits in those cartridges can, and often are safely exceeded by knowledgeable shooters who reload their own ammunition. My feelings on standards, codes, and specifications established to protect human health and safety? If you don't understand the basis for them, whether it be electrical, plumbing, mechanical, foundation, structural, or [B]reloading[/B], ... better off to fully conform to the prevailing specs/codes. If you don't completely understand the why behind the specifications, say for example, SAAMI maximum cartridge operating pressures - be cautious. Maybe just purchase and shoot factory ammo. Rant off... not really a rant. An observation based on years of observation of my own reloading and shooting mistakes (and in other areas of life), and those of others. [/QUOTE]
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