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Rifles, Reloading, Optics, Equipment
Reloading
How do you straighten runout?
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<blockquote data-quote="Gone Ballistic" data-source="post: 493103" data-attributes="member: 26477"><p>At the risk of being verbally injured on this one, I'll try to answer your questions. Keep in mind that I took physics close to 50 years ago. That I was taught well and received an A in the class isn't the problem with what I'm going to mention. The fact that my memory is becoming somewhat strained over that much time is.</p><p>When pressure is applied between two opposing forces, the one with the least resistance will move first. In the case of shooting a firearm, there are alternate moving forces applied by the same pressure at different rates of sequence. First, when the primer ignites the powder, the two forces are the cartridge and the bullet. The cartridge, being the weaker of the two, expands and seals the chamber where the chamber and bolt face make it stronger than the bullet. The bullet propels forward into the L&G's and exits the barrel. The propellent has maximized it's burn rate slightly before the bullet has left the barrel increasing pressure until the bullet exits. Due to the molecular structure of the brass casing, the heat and pressure that caused it to expand and seal the case is no longer there thus, letting it cool and contract minimally. If this action didn't take place it would make it extremely difficult to extract the casing. Brass is the best material found that will expand and contract this way.lightbulb</p><p>The invention of slower burning rate powders has allowed much more precision in reloading due to the reaction timing it creates in the aforementioned paragraphs. I hope this answer has clarified your questions.</p></blockquote><p></p>
[QUOTE="Gone Ballistic, post: 493103, member: 26477"] At the risk of being verbally injured on this one, I'll try to answer your questions. Keep in mind that I took physics close to 50 years ago. That I was taught well and received an A in the class isn't the problem with what I'm going to mention. The fact that my memory is becoming somewhat strained over that much time is. When pressure is applied between two opposing forces, the one with the least resistance will move first. In the case of shooting a firearm, there are alternate moving forces applied by the same pressure at different rates of sequence. First, when the primer ignites the powder, the two forces are the cartridge and the bullet. The cartridge, being the weaker of the two, expands and seals the chamber where the chamber and bolt face make it stronger than the bullet. The bullet propels forward into the L&G's and exits the barrel. The propellent has maximized it's burn rate slightly before the bullet has left the barrel increasing pressure until the bullet exits. Due to the molecular structure of the brass casing, the heat and pressure that caused it to expand and seal the case is no longer there thus, letting it cool and contract minimally. If this action didn't take place it would make it extremely difficult to extract the casing. Brass is the best material found that will expand and contract this way.lightbulb The invention of slower burning rate powders has allowed much more precision in reloading due to the reaction timing it creates in the aforementioned paragraphs. I hope this answer has clarified your questions. [/QUOTE]
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How do you straighten runout?
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