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Rifles, Reloading, Optics, Equipment
Reloading
Belted magnums reloading, from scratch
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<blockquote data-quote="Innovative" data-source="post: 302698" data-attributes="member: 527"><p>MagnumManiac,</p><p> </p><p>You are correct on sereval of your comments, but there's more to the story. The cut-away case (in the picture) was fired 4 times, and headspace was -.005" with a Redding FL die. It might easily have gone another 15 or 16 loadings if it was headspaced .001" at the shoulder. You say that this case doesn't show any bulge? Not so. I'm not sure how much bulge you're looking for <strong>. . . .</strong> but you can see it <u>if you measure it with calipers</u>. This particular case measures .513" diameter above the web. That's a .006" bulge, and in a tight chamber <strong>. . . .</strong> it won't fit <strong>. . . .</strong> not even in the same rifle that fired it. </p><p> </p><p>Why won't fit in the same rifle that just fired it? Because the downward reloading pressure (with a conventional FL die) causes this slight bulge in these weakened cases. Even shooters that neck size need to bump the shoulder, and again <strong>. . . . .</strong> that pushes straight down on the weakened case.</p><p> </p><p>Fired cases stretch, and brass does flow toward the case mouth. However, conventional FL dies <strong>DO </strong>push brass to <u>towards the head</u> of the case. This is especially true if it's a tight die (tight compared to your particular chamber). Conventional FL dies are "tapered" and when pushed down on a case, the brass moves inward <strong>AND</strong> rearward. When the die stops at the belt, that's where the swaged brass builds up. After a belted case is loaded several times it accumulates, and it becomes impossible to resize properly. </p><p> </p><p>Belted magnum chambers often measure up to .008" over the size of an unfired case. All of the cartridge drawings in the world won't give you a better picture than one of your fireformed cases. When a fired case gets stretched like the one in my picture, it's obviously beyond reloading. Like you say, it would separate on the next firing. That's why it it so important to watch the headspace closely, and inspect your cases. </p><p> </p><p>I never wear my barrels or waste my powder, bullets and primers on firingforming my cases with "mild loads", although (I agree) it can solve the initial case stretching problem. I want all of my handloads to be ready to go, to chamber perfectly and to never separate. </p><p> </p><p>(So far over 2,800 shooters agree)</p><p> </p><p>- Innovative</p></blockquote><p></p>
[QUOTE="Innovative, post: 302698, member: 527"] MagnumManiac, You are correct on sereval of your comments, but there's more to the story. The cut-away case (in the picture) was fired 4 times, and headspace was -.005" with a Redding FL die. It might easily have gone another 15 or 16 loadings if it was headspaced .001" at the shoulder. You say that this case doesn't show any bulge? Not so. I'm not sure how much bulge you're looking for [B]. . . .[/B] but you can see it [U]if you measure it with calipers[/U]. This particular case measures .513" diameter above the web. That's a .006" bulge, and in a tight chamber [B]. . . .[/B] it won't fit [B]. . . .[/B] not even in the same rifle that fired it. Why won't fit in the same rifle that just fired it? Because the downward reloading pressure (with a conventional FL die) causes this slight bulge in these weakened cases. Even shooters that neck size need to bump the shoulder, and again [B]. . . . .[/B] that pushes straight down on the weakened case. Fired cases stretch, and brass does flow toward the case mouth. However, conventional FL dies [B]DO [/B]push brass to [U]towards the head[/U] of the case. This is especially true if it's a tight die (tight compared to your particular chamber). Conventional FL dies are "tapered" and when pushed down on a case, the brass moves inward [B]AND[/B] rearward. When the die stops at the belt, that's where the swaged brass builds up. After a belted case is loaded several times it accumulates, and it becomes impossible to resize properly. Belted magnum chambers often measure up to .008" over the size of an unfired case. All of the cartridge drawings in the world won't give you a better picture than one of your fireformed cases. When a fired case gets stretched like the one in my picture, it's obviously beyond reloading. Like you say, it would separate on the next firing. That's why it it so important to watch the headspace closely, and inspect your cases. I never wear my barrels or waste my powder, bullets and primers on firingforming my cases with "mild loads", although (I agree) it can solve the initial case stretching problem. I want all of my handloads to be ready to go, to chamber perfectly and to never separate. (So far over 2,800 shooters agree) - Innovative [/QUOTE]
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Belted magnums reloading, from scratch
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