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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Custom action pressure ceiling.
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<blockquote data-quote="Autorotate" data-source="post: 375207" data-attributes="member: 8073"><p>The best written reference I have come across regarding a discussion of "pressure signs" is <a href="http://www.midwayusa.com/viewProduct/?productNumber=524043" target="_blank">Any Shot You Want</a> by Art Alphin.</p><p></p><p>The discussion in the book is referenced by pressure barrel testing, and puts the classic pressure signs of sticky bolt lift, primer cratering, ejector plunger marks, and case head swelling to the test using actual pressure barrels.</p><p></p><p>His testing might raise some eyebrows, and cause some feathers to be ruffled.</p><p></p><p>In short....his testing revealed once "visual/measurable" pressure signs are detected by the shooter, they are not indications of "<em>pressure"</em> but are indications of being <u><em>way over pressure</em></u>.</p><p></p><p>If my book wasn't packed up right now, I'd type the applicable pages in a post on this thread and hope the lawyers couldn't track me down<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>That said, I used the previously posted technique by Kirby in a <a href="http://www.longrangehunting.com/forums/f53/je-custom-lone-wolf-30-338-lapua-improved-weatherby-mark-v-54231/" target="_blank">30-338 Lapua Improved</a> of using Norma cases for pressure load development, and then switching over to the Lapua case for final load development.....so I'm not looking down my nose at the discussion here...just offering a written reference to consult on pressure signs that actually puts a CUP/PSI/piezo rating with an indication.</p><p></p><p>If there are any other written references that use pressure barrels and actual laboratory testing data, and ties the classic visual/measurement indications that a shooter might use to determine pressure with a CUP/PSI/piezo rating, I would ask to please share that.</p><p></p><p>Good luck!</p></blockquote><p></p>
[QUOTE="Autorotate, post: 375207, member: 8073"] The best written reference I have come across regarding a discussion of "pressure signs" is [URL="http://www.midwayusa.com/viewProduct/?productNumber=524043"]Any Shot You Want[/URL] by Art Alphin. The discussion in the book is referenced by pressure barrel testing, and puts the classic pressure signs of sticky bolt lift, primer cratering, ejector plunger marks, and case head swelling to the test using actual pressure barrels. His testing might raise some eyebrows, and cause some feathers to be ruffled. In short....his testing revealed once "visual/measurable" pressure signs are detected by the shooter, they are not indications of "[I]pressure"[/I] but are indications of being [U][I]way over pressure[/I][/U]. If my book wasn't packed up right now, I'd type the applicable pages in a post on this thread and hope the lawyers couldn't track me down:) That said, I used the previously posted technique by Kirby in a [URL="http://www.longrangehunting.com/forums/f53/je-custom-lone-wolf-30-338-lapua-improved-weatherby-mark-v-54231/"]30-338 Lapua Improved[/URL] of using Norma cases for pressure load development, and then switching over to the Lapua case for final load development.....so I'm not looking down my nose at the discussion here...just offering a written reference to consult on pressure signs that actually puts a CUP/PSI/piezo rating with an indication. If there are any other written references that use pressure barrels and actual laboratory testing data, and ties the classic visual/measurement indications that a shooter might use to determine pressure with a CUP/PSI/piezo rating, I would ask to please share that. Good luck! [/QUOTE]
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