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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5-06 build but to AI it or Gibbs it or leave it like it is?
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<blockquote data-quote="elkaholic" data-source="post: 1893261" data-attributes="member: 13833"><p>I went through the same process a few years ago. I had 6.5 A.I.'s that I really liked but decided to up the performance a bit after going through the second barrel. I decided on the Gibbs because I knew they were the most you could get out of an '06 head size. I went as far as ordering brass from Quality Cartridge, but when I looked at it, I thought the neck was waaaay too short for my liking.</p><p>This was when I decided since I was dealing with a wildcat anyway, I would design my own. That's when the 6.5 Sherman was created back in '08. I really liked the A.I. design but wanted Gibbs capacity so I started with a 270W case to gain .046" more length. I took more taper out of the case than the A.I., moved the shoulder forward and maintained the 40 degree angle. The result was a case that still had a .300" long neck and near identical capacity as the Gibbs. Around 75 1/2 grains with WW or Norma brass. The result was performance near a 264 WM with much better barrel life. There have been a bunch of them built and with the modern powders, people have reached near 3300' with 140 grain bullets.</p><p>Reamers and dies are in stock and cases are easy to form.</p><p>shermanwildcatcartridges.com</p></blockquote><p></p>
[QUOTE="elkaholic, post: 1893261, member: 13833"] I went through the same process a few years ago. I had 6.5 A.I.'s that I really liked but decided to up the performance a bit after going through the second barrel. I decided on the Gibbs because I knew they were the most you could get out of an '06 head size. I went as far as ordering brass from Quality Cartridge, but when I looked at it, I thought the neck was waaaay too short for my liking. This was when I decided since I was dealing with a wildcat anyway, I would design my own. That's when the 6.5 Sherman was created back in '08. I really liked the A.I. design but wanted Gibbs capacity so I started with a 270W case to gain .046" more length. I took more taper out of the case than the A.I., moved the shoulder forward and maintained the 40 degree angle. The result was a case that still had a .300" long neck and near identical capacity as the Gibbs. Around 75 1/2 grains with WW or Norma brass. The result was performance near a 264 WM with much better barrel life. There have been a bunch of them built and with the modern powders, people have reached near 3300' with 140 grain bullets. Reamers and dies are in stock and cases are easy to form. shermanwildcatcartridges.com [/QUOTE]
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6.5-06 build but to AI it or Gibbs it or leave it like it is?
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