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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
25-06AI case forming
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<blockquote data-quote="elkaholic" data-source="post: 771053" data-attributes="member: 13833"><p>Joel is correct when you are talking an A.I. because they headspace ok on the neck/shoulder junction. The Gibbs is another story. I would neck the case up to .338 and then back down to .30 just enough so that the bolt closes stiffly. In that particular cartridge, I would use about 12 grains of Red Dot or equivalent of other shotgun/pistol powder. Fill to the neck with cream of wheat and plug the neck with cotton, paper, wax or ?? Use ANY primer and fire away. The shoulder will still be a little rounded but they will shoot just fine and square up on the first full load. Another tip for both the A.I. and especially the Gibbs is to use 270W brass and you will end up with a much better neck. Here is another solution for your Gibbs! Rechamber to 300 Sherman and have the same velocity with a much better designed cartridge (especially the neck)<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" />........Rich</p></blockquote><p></p>
[QUOTE="elkaholic, post: 771053, member: 13833"] Joel is correct when you are talking an A.I. because they headspace ok on the neck/shoulder junction. The Gibbs is another story. I would neck the case up to .338 and then back down to .30 just enough so that the bolt closes stiffly. In that particular cartridge, I would use about 12 grains of Red Dot or equivalent of other shotgun/pistol powder. Fill to the neck with cream of wheat and plug the neck with cotton, paper, wax or ?? Use ANY primer and fire away. The shoulder will still be a little rounded but they will shoot just fine and square up on the first full load. Another tip for both the A.I. and especially the Gibbs is to use 270W brass and you will end up with a much better neck. Here is another solution for your Gibbs! Rechamber to 300 Sherman and have the same velocity with a much better designed cartridge (especially the neck):D........Rich [/QUOTE]
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25-06AI case forming
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