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Tennessee Gun Owners Forums
Reloading
Minimum Reloading Equipment Necessary
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<blockquote data-quote="BobTail" data-source="post: 4247985" data-attributes="member: 3752"><p>Waiting for the case to show that it has "bumped the end of the chamber" is courting disaster. You simply cannot "eyeball" a case length and determine the safety of the case. A case that long is a sure setup for clamping the neck down on the bullet and raising the pressures to disastrous levels. DON'T DO THAT !!! If this has been your manner of judging the safety of a case consider yourself fortunate that you still have all of your fingers and eyes. Doing it wrong for years doesn't make it right.</p><p></p><p>When an overlength case is chambered, the mouth or edge of the neck will come up against the throat before the bolt has fully closed or the case shoulder has contacted the chamber. The camming action of the bolt is so powerful that it will actually crimp the case mouth fully into the bullet (without you knowing it) and wedge the case so solidly between the bullet and the throat that the neck cannot expand to release the bullet. Chamber pressures in this situation can and most certainly will go dangerously high. If a case shows evidence that it has contacted the chamber throat when fired it was too long to begin with.</p><p></p><p>Calipers are cheap. Even the very inexpensive ones (under$50) are adequate. You ideally should measure brass length every time you prepare the case for loading. That's the PROPER and SAFE way to go about it.</p></blockquote><p></p>
[QUOTE="BobTail, post: 4247985, member: 3752"] Waiting for the case to show that it has "bumped the end of the chamber" is courting disaster. You simply cannot "eyeball" a case length and determine the safety of the case. A case that long is a sure setup for clamping the neck down on the bullet and raising the pressures to disastrous levels. DON'T DO THAT !!! If this has been your manner of judging the safety of a case consider yourself fortunate that you still have all of your fingers and eyes. Doing it wrong for years doesn't make it right. When an overlength case is chambered, the mouth or edge of the neck will come up against the throat before the bolt has fully closed or the case shoulder has contacted the chamber. The camming action of the bolt is so powerful that it will actually crimp the case mouth fully into the bullet (without you knowing it) and wedge the case so solidly between the bullet and the throat that the neck cannot expand to release the bullet. Chamber pressures in this situation can and most certainly will go dangerously high. If a case shows evidence that it has contacted the chamber throat when fired it was too long to begin with. Calipers are cheap. Even the very inexpensive ones (under$50) are adequate. You ideally should measure brass length every time you prepare the case for loading. That's the PROPER and SAFE way to go about it. [/QUOTE]
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Tennessee Gun Owners Forums
Reloading
Minimum Reloading Equipment Necessary
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