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Posted: 10/15/2009 10:21:30 AM EDT
| Hello all, I'm interested in trying something new. I would like to neck size my 308 cases only instead of the full length method. ( This will be for a bolt rifle of mine only ) Is there an easy way to do this? Can I use my existing dies? Thank guys. |
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Lube the case neck and run it part way into the full length sizer. Stop just before the tangency with the shoulder, the larger diameter in the remaining bit of neck will help with alignment.
Watch the case neck as the sizer is turned down - it's easy to see the progress as the die is moved. Stop just before the shoulder. |
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Quoted:
Lube the case neck and run it part way into the full length sizer. Stop just before the tangency with the shoulder, the larger diameter in the remaining bit of neck will help with alignment. Watch the case neck as the sizer is turned down - it's easy to see the progress as the die is moved. Stop just before the shoulder. I'm not sure I understand what you are saying. I want to do the same thing as the OP. When I back the die out 2 turns from touching shell holder, I get a ring around the center of the neck. The whole neck should be sizedcorrect? Case length goes from 2.005 to 2.011. So there is some stretching of the case. Is that normal? When I turn die to where the whole neck is sized, case length goes to 2.015 +/- .001. What am I doing wrong? |
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Quoted:
Quoted:
Lube the case neck and run it part way into the full length sizer. Stop just before the tangency with the shoulder, the larger diameter in the remaining bit of neck will help with alignment. Watch the case neck as the sizer is turned down - it's easy to see the progress as the die is moved. Stop just before the shoulder. I'm not sure I understand what you are saying. I want to do the same thing as the OP. When I back the die out 2 turns from touching shell holder, I get a ring around the center of the neck. The whole neck should be sizedcorrect? Case length goes from 2.005 to 2.011. So there is some stretching of the case. Is that normal? I'd think it was mostly normal. Pay attention to properly lubing the inside and outside of the neck. A lot of times the expander will fit too tight, drag and pull the neck out giving you the variance in case length. When I turn die to where the whole neck is sized, case length goes to 2.015 +/- .001. What am I doing wrong? |
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Quoted:
Quoted:
Lube the case neck and run it part way into the full length sizer. Stop just before the tangency with the shoulder, the larger diameter in the remaining bit of neck will help with alignment. Watch the case neck as the sizer is turned down - it's easy to see the progress as the die is moved. Stop just before the shoulder. I'm not sure I understand what you are saying. I want to do the same thing as the OP. When I back the die out 2 turns from touching shell holder, I get a ring around the center of the neck. The whole neck should be sizedcorrect? Case length goes from 2.005 to 2.011. So there is some stretching of the case. Is that normal? When I turn die to where the whole neck is sized, case length goes to 2.015 +/- .001. What am I doing wrong? Remove the expander ball, lube the inside of the case neck, or use lube and a carbide expander ball to stop stretching the case. Instead of running the die out an arbitrary two turns, run it down until the length you want sized goes through the die. Stop just a little short of the transition to the shoulder. Running the die out means the thickness of the top of the shell holder (and the 14 pitch thread) controls the final dimension. Running the die down allows the user to control the final length of the neck that gets sized. Usually the shell holder thing is not really a factor, but after my recent experience with my two guns chambered for .22 Jet, I'm going to start paying closer attention. |
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I use full-length sizing dies with interchangeable neck bushings. They size all but the bottom .050" of the neck, which stays at chamber diameter.
I set the sizing die to bump the shoulder back about .002". If you don't have the gauges to measure this, simply size the case just a little bit at a time until the bolt closes on it with just a hint of resistance. |
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