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Rifles, Reloading, Optics, Equipment
Reloading
Too early to do load developement?
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<blockquote data-quote="MagnumManiac" data-source="post: 1908325" data-attributes="member: 10755"><p>In order to know when your brass has become stable and is filling the chamber can only be achieved by careful measuring. I use RCBS Precision Mic for this chore. When the brass is stable, it no longer grows either in shoulder datum to head length or do the necks elongate. Then careful sizing and neck expanding are performed. I now use Forster Comp FL dies with honed necks and polished expanders in conjunction with a mandrel turned to my specs. The FL die hardly changes the neck, it brings it back to bullet diameter and the mandrel gives me the final dimension. I like my chambers to have no more than .004" for neck expansion. I also don't use tight neck chambers anymore either, had bad experience with excessive pressures with a tiny carbon ring and damaged an expensive barrel, it was re-usable after setting back, but it lost a full season with that trimming back...not happy.</p><p>I let my rifle barrel tell me what neck tension it likes. I start at .0015" and work up in .0005" increments until I hit .004" max, as I feel this is a lot of neck movement beyond this amount.</p><p>Usually, somewhere in that range produces the perfect tension the gun likes.</p><p>One barrel I have in 300WM likes .004", all others are .0015"-.0025" where they like to be.</p><p></p><p>Hope this helps.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1908325, member: 10755"] In order to know when your brass has become stable and is filling the chamber can only be achieved by careful measuring. I use RCBS Precision Mic for this chore. When the brass is stable, it no longer grows either in shoulder datum to head length or do the necks elongate. Then careful sizing and neck expanding are performed. I now use Forster Comp FL dies with honed necks and polished expanders in conjunction with a mandrel turned to my specs. The FL die hardly changes the neck, it brings it back to bullet diameter and the mandrel gives me the final dimension. I like my chambers to have no more than .004” for neck expansion. I also don’t use tight neck chambers anymore either, had bad experience with excessive pressures with a tiny carbon ring and damaged an expensive barrel, it was re-usable after setting back, but it lost a full season with that trimming back...not happy. I let my rifle barrel tell me what neck tension it likes. I start at .0015” and work up in .0005” increments until I hit .004” max, as I feel this is a lot of neck movement beyond this amount. Usually, somewhere in that range produces the perfect tension the gun likes. One barrel I have in 300WM likes .004”, all others are .0015“-.0025” where they like to be. Hope this helps. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Too early to do load developement?
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