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Rifles, Reloading, Optics, Equipment
Reloading
Neck tension and max bullet grip force
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<blockquote data-quote="243winxb" data-source="post: 2135427" data-attributes="member: 97793"><p><a href="https://discover.dtic.mil/" target="_blank">https://discover.dtic.mil/</a></p><p></p><p>The military uses "Bullet Pull" The 5.56 minimum is 35 pounds.</p><p></p><p>E.1-4.3 Bullet Pull.</p><p>The purpose of this test is to determine, and/or confirm, the force required to extract (pull) a</p><p>projectile from its case. It is a measure of security of the projectile within the case so that it will</p><p>not separate during handling or feeding. Correct (and consistent) bullet pull force affects</p><p>consistency of propellant burning and resulting velocity consistency. Ammunition</p><p>specifications usually state a minimum extraction force that the projectile must resist.</p><p></p><p>Hold the cartridge case to be tested in a test fixture and apply a tensile load to the bullet at a rate</p><p>of travel of the loading head given in the ammunition specifications. The procedure and</p><p>equipment used should be reported along with the results and observations. Record the force</p><p>(average, range & standard deviation) required to extract the projectile from the case, the rate of</p><p>travel of the loading head, and the test apparatus used.</p><p></p><p>(2) Bullet pull is measured by inserting the complete round</p><p>of ammunition in a univeraal testing machine, a lover clamping device</p><p>holds the bottom of the cartridge case and an adjustable sensitive cross</p><p>head grips the projectile body between the rotating band and bourrelet«</p><p>Motion of the sensitive cross head at specified strain rates produces</p><p>hydraulic pressure in the loading cylinder of the machine, load indication</p><p>read directly on the dial of the test machine is a function of this by*</p><p>draulio pressure.</p><p>(3) In actual practice, hydraulic and pnetnatio pipe operated</p><p>by foot pedals are used to simplify and speed up insertion and removal</p><p>of the the teat rounds. The operator for safety reasons conducts the de«</p><p>bulleting teat by remote control from a barricaded room«</p><p></p><p><a href="https://www.mecmesin.com/publications/bullet-extraction-and-seating-force-testing" target="_blank">https://www.mecmesin.com/publications/bullet-extraction-and-seating-force-testing</a></p></blockquote><p></p>
[QUOTE="243winxb, post: 2135427, member: 97793"] [URL]https://discover.dtic.mil/[/URL] The military uses "Bullet Pull" The 5.56 minimum is 35 pounds. E.1-4.3 Bullet Pull. The purpose of this test is to determine, and/or confirm, the force required to extract (pull) a projectile from its case. It is a measure of security of the projectile within the case so that it will not separate during handling or feeding. Correct (and consistent) bullet pull force affects consistency of propellant burning and resulting velocity consistency. Ammunition specifications usually state a minimum extraction force that the projectile must resist. Hold the cartridge case to be tested in a test fixture and apply a tensile load to the bullet at a rate of travel of the loading head given in the ammunition specifications. The procedure and equipment used should be reported along with the results and observations. Record the force (average, range & standard deviation) required to extract the projectile from the case, the rate of travel of the loading head, and the test apparatus used. (2) Bullet pull is measured by inserting the complete round of ammunition in a univeraal testing machine, a lover clamping device holds the bottom of the cartridge case and an adjustable sensitive cross head grips the projectile body between the rotating band and bourrelet« Motion of the sensitive cross head at specified strain rates produces hydraulic pressure in the loading cylinder of the machine, load indication read directly on the dial of the test machine is a function of this by* draulio pressure. (3) In actual practice, hydraulic and pnetnatio pipe operated by foot pedals are used to simplify and speed up insertion and removal of the the teat rounds. The operator for safety reasons conducts the de« bulleting teat by remote control from a barricaded room« [URL]https://www.mecmesin.com/publications/bullet-extraction-and-seating-force-testing[/URL] [/QUOTE]
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Neck tension and max bullet grip force
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