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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5-300 Wby cartridge stuck and primer blown out
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<blockquote data-quote="nvschütze" data-source="post: 1688370" data-attributes="member: 110896"><p>When the bolt stuck when the suspect rounds were fired, I knew what was the problem. In order to get to another load, I had to remove the case that stuck in the chamber. The brass rod does it extremely well.</p><p></p><p>The rounds that did stick were usually at the upper end of the incremental series being tested. What puzzles me is that one or two rounds of the five being fired at that specific charge might present a reluctant bolt (slightly difficulty to extract) while the second one might present a sticky bolt (more difficult than a reluctant bolt), even though both cartridges were loaded to the same charge. The fifth round might present no difficulty at all. I have no explanation for why this was seen.</p><p></p><p>The case obturates upon firing, then relaxes close to immediately after being fired. That round will easily extract. If the case sticks in the chamber, it's because brass weakly adheres to steel under the pressure of the propellant being burned. The length of the extractor with respect to the circumference of the rim is small, providing for a small purchase upon the rim. That small purchase makes for a difficult extraction of the fired case. If the extractor was several times longer than we usually see, we'd rarely have sticking cases.</p><p></p><p>Rifle receivers are proofed to pressures no <em>competent</em> reloader will ever see. The case is going to fail before we'll see a mechanical failure of the receiver, but it might if a reloader substitutes a pistol powder because he didn't have the correct rifle powder. I actually read it at some point in the past that some dingbat asked if he could use a powder for .45ACP because he didn't have a suitable powder for his .308Win. By the time I saw that question, months and months had passed since it had been posted. If he who asked was so fired-up to load his .308 with pistol powder, I hope nothing unfortunate became of him. I'll never know, but he does have the right to do what he so desires and face the consequences...</p></blockquote><p></p>
[QUOTE="nvschütze, post: 1688370, member: 110896"] When the bolt stuck when the suspect rounds were fired, I knew what was the problem. In order to get to another load, I had to remove the case that stuck in the chamber. The brass rod does it extremely well. The rounds that did stick were usually at the upper end of the incremental series being tested. What puzzles me is that one or two rounds of the five being fired at that specific charge might present a reluctant bolt (slightly difficulty to extract) while the second one might present a sticky bolt (more difficult than a reluctant bolt), even though both cartridges were loaded to the same charge. The fifth round might present no difficulty at all. I have no explanation for why this was seen. The case obturates upon firing, then relaxes close to immediately after being fired. That round will easily extract. If the case sticks in the chamber, it's because brass weakly adheres to steel under the pressure of the propellant being burned. The length of the extractor with respect to the circumference of the rim is small, providing for a small purchase upon the rim. That small purchase makes for a difficult extraction of the fired case. If the extractor was several times longer than we usually see, we'd rarely have sticking cases. Rifle receivers are proofed to pressures no [I]competent[/I] reloader will ever see. The case is going to fail before we'll see a mechanical failure of the receiver, but it might if a reloader substitutes a pistol powder because he didn't have the correct rifle powder. I actually read it at some point in the past that some dingbat asked if he could use a powder for .45ACP because he didn't have a suitable powder for his .308Win. By the time I saw that question, months and months had passed since it had been posted. If he who asked was so fired-up to load his .308 with pistol powder, I hope nothing unfortunate became of him. I'll never know, but he does have the right to do what he so desires and face the consequences... [/QUOTE]
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6.5-300 Wby cartridge stuck and primer blown out
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