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Rifles, Reloading, Optics, Equipment
Reloading
Stuck Brass
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<blockquote data-quote="bigedp51" data-source="post: 1881262" data-attributes="member: 28965"><p>Your cases were fired in another chamber and formed to that chamber, what you are dealing with is brass spring back after sizing.</p><p></p><p>I buy bulk once fired Lake City 5.56 and 7.62 brass fired in a multitude of chambers. The 7.62 cases give me the biggest problem because they were fired in larger machine gun chambers. I use a small base die to size the cases the first time to reduce then to minimum dimensions.</p><p></p><p>What you can try is to full length resize the cases again and pause 4 or 5 seconds at the top of the ram stroke. This will reduce the brass spring back after sizing and might fix your problem.</p><p></p><p>NOTE, with semi-auto rifles after sizing the case diameter should be .003 to .005 smaller than their fired diameter. This ensures the case will spring back from the chamber walls and extracts reliably.</p><p></p><p>Chambers and dies vary in size but you may be forced to buy new brass to eliminate the problem. That being said I have a .223 Lee full length die that will reduce the case body diameter more than my .223/5.56 RCBS small base die.</p><p></p><p>Coloring the case with a black felt tip marker will tell you where the fired cases are rubbing. The case may be rubbing on the shoulder and require more shoulder bump. Or if its the case body rubbing only a small base die or pausing at the top of the ram stroke will help reduce the body diameter.</p></blockquote><p></p>
[QUOTE="bigedp51, post: 1881262, member: 28965"] Your cases were fired in another chamber and formed to that chamber, what you are dealing with is brass spring back after sizing. I buy bulk once fired Lake City 5.56 and 7.62 brass fired in a multitude of chambers. The 7.62 cases give me the biggest problem because they were fired in larger machine gun chambers. I use a small base die to size the cases the first time to reduce then to minimum dimensions. What you can try is to full length resize the cases again and pause 4 or 5 seconds at the top of the ram stroke. This will reduce the brass spring back after sizing and might fix your problem. NOTE, with semi-auto rifles after sizing the case diameter should be .003 to .005 smaller than their fired diameter. This ensures the case will spring back from the chamber walls and extracts reliably. Chambers and dies vary in size but you may be forced to buy new brass to eliminate the problem. That being said I have a .223 Lee full length die that will reduce the case body diameter more than my .223/5.56 RCBS small base die. Coloring the case with a black felt tip marker will tell you where the fired cases are rubbing. The case may be rubbing on the shoulder and require more shoulder bump. Or if its the case body rubbing only a small base die or pausing at the top of the ram stroke will help reduce the body diameter. [/QUOTE]
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Stuck Brass
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