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The Basics, Starting Out
First time Fire Forming to Ackley
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<blockquote data-quote="J E Custom" data-source="post: 706039" data-attributes="member: 2736"><p>As MM242 Said Most AIs headspace on the neck shoulder junction and not the datum line .</p><p></p><p>Depending on how your smith chambered and head spaced, determine how the first firing</p><p>case fit is. </p><p></p><p>As stated there should be no reason to use the bullet to head space.</p><p></p><p>Rounded shoulder edges are a sign of lower pressure, I would back the bullet off he lands and</p><p>up the powder charge to the middle of the recommended loads.</p><p></p><p>Lapua bras is tough and this is not uncommon on the first firing. after fire forming size only </p><p>enough to close the bolt on the round.</p><p></p><p>The reason the brass is tight is the brass was not formed well and spring back aloud the case to </p><p>return to a larger size, Or you have the dies set two tight and need to re adjust them.</p><p></p><p>Setting up to load/fire form AIs takes time and patients but is well worth the time if done right.</p><p></p><p>Depending on the chamber, some dies are just not the correct dimensions for it. (Sometimes a </p><p>neck sizer is nessary to get the best fit in a custom chamber.</p><p></p><p>Just some ideas to help.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 706039, member: 2736"] As MM242 Said Most AIs headspace on the neck shoulder junction and not the datum line . Depending on how your smith chambered and head spaced, determine how the first firing case fit is. As stated there should be no reason to use the bullet to head space. Rounded shoulder edges are a sign of lower pressure, I would back the bullet off he lands and up the powder charge to the middle of the recommended loads. Lapua bras is tough and this is not uncommon on the first firing. after fire forming size only enough to close the bolt on the round. The reason the brass is tight is the brass was not formed well and spring back aloud the case to return to a larger size, Or you have the dies set two tight and need to re adjust them. Setting up to load/fire form AIs takes time and patients but is well worth the time if done right. Depending on the chamber, some dies are just not the correct dimensions for it. (Sometimes a neck sizer is nessary to get the best fit in a custom chamber. Just some ideas to help. J E CUSTOM [/QUOTE]
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The Basics, Starting Out
First time Fire Forming to Ackley
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