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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bumping technique
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<blockquote data-quote="fguffey" data-source="post: 1858289" data-attributes="member: 113511"><p>When the die does not make it to the shell holder the case has more resistance to sizing than the press can overcome. When I want to know the gap between the bottom of the die and top of the shell holder I use a feeler gage, the feeler gage is an excellent tool for measuring gaps.</p><p></p><p>And then there is cam over, I have at least 12 Herter presses, all of my Herter press cam over, my Herter presses are know as bump presses; because they cam over. I have 3 RCBS Rock Chucker presses, none of my Rock Chuckers cam over meaning they are not bump presses. All we have to do if find a reloader that can measure cam over.</p><p></p><p>I can increase my presse's ability to overcome the cases ability to resist sizing. The method is the same method I use for sizing cases for short chambers.</p><p></p><p>I am not sure I understand why you insist on full length sizing, I determine the length of the chamber from the shoulder of the chamber to the bolt face and then adjust the die in the press; there are times I adjust the die to avoid full length sizing. Again I have a 30/06 rifle with a field reject length chamber (from the shoulder to the bolt face). What this means the chamber is .016" longer from the shoulder of the chamber to the bolt face than a full length sized case from the shoulder of the case to the case head. If I chambered a minimum length/full length sized case in that chamber it would have .016" clearance.</p><p></p><p>F. Guffey</p></blockquote><p></p>
[QUOTE="fguffey, post: 1858289, member: 113511"] When the die does not make it to the shell holder the case has more resistance to sizing than the press can overcome. When I want to know the gap between the bottom of the die and top of the shell holder I use a feeler gage, the feeler gage is an excellent tool for measuring gaps. And then there is cam over, I have at least 12 Herter presses, all of my Herter press cam over, my Herter presses are know as bump presses; because they cam over. I have 3 RCBS Rock Chucker presses, none of my Rock Chuckers cam over meaning they are not bump presses. All we have to do if find a reloader that can measure cam over. I can increase my presse's ability to overcome the cases ability to resist sizing. The method is the same method I use for sizing cases for short chambers. I am not sure I understand why you insist on full length sizing, I determine the length of the chamber from the shoulder of the chamber to the bolt face and then adjust the die in the press; there are times I adjust the die to avoid full length sizing. Again I have a 30/06 rifle with a field reject length chamber (from the shoulder to the bolt face). What this means the chamber is .016" longer from the shoulder of the chamber to the bolt face than a full length sized case from the shoulder of the case to the case head. If I chambered a minimum length/full length sized case in that chamber it would have .016" clearance. F. Guffey [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bumping technique
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