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Rifles, Reloading, Optics, Equipment
Reloading
Problems on the range..
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<blockquote data-quote="bigedp51" data-source="post: 1356098" data-attributes="member: 28965"><p>You can try three things when using once fired brass from a different rifle.</p><p>1. Adjust the die to contact the shell holder then give it 1/8 to 1/4 of a turn more. Then when full length resizing pause at the top of the ram stroke for 4 or 5 seconds. The pausing reduces brass spring back and the brass bouncing back to its fired size after sizing.</p><p></p><p>2. Buy a small base die because it will do two things. It will reduce the case diameter .003 more than a standard die and also push the shoulder back .003 more than a standard die. Meaning it reduces the case to minimum SAAMI dimensions.</p><p></p><p>3. You can lap the top of the shell holder a few thousandths at a time until the resized case fits your chamber. This pushes the case further into the die and bumps the shoulder back more.</p><p></p><p>Dies and chambers vary in size and sometimes you can end up with a short headspaced chamber and a long die that does not push the case shoulder back enough.</p><p></p><p>I buy a lot of once fired Lake City 7.62 and 5.56 brass and I size all these cases "once" with a small base die. After this first sizing I fire these cases in my chamber I then use a standard full length die.</p><p></p><p>NOTE, when you full length resize a case it actually becomes longer than the chamber in headspace length at one point. Then at the last bit of travel of the case into the die the shoulder is pushed back.</p><p></p><p>Below when full length resizing the brass can only move upward in the die. And as you can see below the die must push the case shoulder below the red dotted line. If the shoulder is not pushed to below the red dotted line the case becomes longer than the chamber and hard to chamber.</p><p></p><p><img src="https://i.imgur.com/wm05ArY.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1356098, member: 28965"] You can try three things when using once fired brass from a different rifle. 1. Adjust the die to contact the shell holder then give it 1/8 to 1/4 of a turn more. Then when full length resizing pause at the top of the ram stroke for 4 or 5 seconds. The pausing reduces brass spring back and the brass bouncing back to its fired size after sizing. 2. Buy a small base die because it will do two things. It will reduce the case diameter .003 more than a standard die and also push the shoulder back .003 more than a standard die. Meaning it reduces the case to minimum SAAMI dimensions. 3. You can lap the top of the shell holder a few thousandths at a time until the resized case fits your chamber. This pushes the case further into the die and bumps the shoulder back more. Dies and chambers vary in size and sometimes you can end up with a short headspaced chamber and a long die that does not push the case shoulder back enough. I buy a lot of once fired Lake City 7.62 and 5.56 brass and I size all these cases "once" with a small base die. After this first sizing I fire these cases in my chamber I then use a standard full length die. NOTE, when you full length resize a case it actually becomes longer than the chamber in headspace length at one point. Then at the last bit of travel of the case into the die the shoulder is pushed back. Below when full length resizing the brass can only move upward in the die. And as you can see below the die must push the case shoulder below the red dotted line. If the shoulder is not pushed to below the red dotted line the case becomes longer than the chamber and hard to chamber. [IMG]https://i.imgur.com/wm05ArY.gif[/IMG] [/QUOTE]
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Problems on the range..
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