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Rifles, Reloading, Optics, Equipment
Reloading
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<blockquote data-quote="25WSM" data-source="post: 1970058" data-attributes="member: 38048"><p>Well it seems that you don't understand what your die is doing. You have had great help here. Use it.</p><p>First you are never going to get fired brass back to new size. Even a small base die doesn't get you there.</p><p>Second it really doesn't matter what size your new brass is. You are measuring fired brass to see how much you need to bump. In your case yes the length you want is what you started with. The numbers don't lie. This is seldom the case. Like I explained to you in post 23 your new length will almost always be longer than factory new brass.</p><p>Third you can neck size one piece of brass and fire it till it snugs up and it's going to measure .001 longer than a one time fired brass unless you over pressure it. Just take your 1 time fired brass bump it . 002 to . 003 and your good to go. If your fireforming an Ackley or blowing a shoulder forward with light loads then yes a few shots might make a more accurate measurement. If you try and make it fit less than . 002 from the get go you will probably have to adjust your die after 5 or 6 shots after it work hardens some. 2 things happen after working the brass. One is when fired it doesn't shrink back as much. Two is you get spring back when sized. Both will make your length longer to the shoulder. Annealing will fix this. You didn't mention if you anneal.</p><p>Fourth you can just do it how you like and if it works great.</p><p>Shep</p></blockquote><p></p>
[QUOTE="25WSM, post: 1970058, member: 38048"] Well it seems that you don't understand what your die is doing. You have had great help here. Use it. First you are never going to get fired brass back to new size. Even a small base die doesn't get you there. Second it really doesn't matter what size your new brass is. You are measuring fired brass to see how much you need to bump. In your case yes the length you want is what you started with. The numbers don't lie. This is seldom the case. Like I explained to you in post 23 your new length will almost always be longer than factory new brass. Third you can neck size one piece of brass and fire it till it snugs up and it's going to measure .001 longer than a one time fired brass unless you over pressure it. Just take your 1 time fired brass bump it . 002 to . 003 and your good to go. If your fireforming an Ackley or blowing a shoulder forward with light loads then yes a few shots might make a more accurate measurement. If you try and make it fit less than . 002 from the get go you will probably have to adjust your die after 5 or 6 shots after it work hardens some. 2 things happen after working the brass. One is when fired it doesn't shrink back as much. Two is you get spring back when sized. Both will make your length longer to the shoulder. Annealing will fix this. You didn't mention if you anneal. Fourth you can just do it how you like and if it works great. Shep [/QUOTE]
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