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Rifles, Reloading, Optics, Equipment
Gunsmithing
Next build 375 something
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<blockquote data-quote="J E Custom" data-source="post: 705184" data-attributes="member: 2736"><p>In my opinion the Excalibur is about the ultimate 338. But it needs a larger action than the 700</p><p>Rem.</p><p></p><p>At one time I looked at necking it up to 416 because of case capacity and with the requirement </p><p>of a MK 5 or a custom action plus the cost and availability of brass and loading equipment it</p><p>more than tripled the cost.</p><p></p><p>The 416 buff will push a 400 grain bullet almost 2700 ft/sec without being overloaded and case life</p><p>of the 416/375 is very good. </p><p></p><p>Without a Muzzle brake it is just about all the recoil I can deal with and after 40 or 50 rounds</p><p>at the range the fun has gone out of it.</p><p></p><p>I also designed a 338 super based on the 375 RUM brass because it is available and works</p><p>in a magnum bolt faced 700 REM. It has been improved and the capacity increased to 115</p><p>to 119 grains of powder (Depending on what powder). </p><p></p><p>Testing is still on going but it appears that case capacity may be unusable, so the standard case </p><p>may be the way to go for the .375 bullets.</p><p></p><p>Rather than improve on the 375 RUM I would elect to go with a 378 Weatherby and a mark 5</p><p>action.</p><p></p><p>Just an opinion, But it is fun to play with different ideas.</p><p></p><p>Keep us posted on your project.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 705184, member: 2736"] In my opinion the Excalibur is about the ultimate 338. But it needs a larger action than the 700 Rem. At one time I looked at necking it up to 416 because of case capacity and with the requirement of a MK 5 or a custom action plus the cost and availability of brass and loading equipment it more than tripled the cost. The 416 buff will push a 400 grain bullet almost 2700 ft/sec without being overloaded and case life of the 416/375 is very good. Without a Muzzle brake it is just about all the recoil I can deal with and after 40 or 50 rounds at the range the fun has gone out of it. I also designed a 338 super based on the 375 RUM brass because it is available and works in a magnum bolt faced 700 REM. It has been improved and the capacity increased to 115 to 119 grains of powder (Depending on what powder). Testing is still on going but it appears that case capacity may be unusable, so the standard case may be the way to go for the .375 bullets. Rather than improve on the 375 RUM I would elect to go with a 378 Weatherby and a mark 5 action. Just an opinion, But it is fun to play with different ideas. Keep us posted on your project. J E CUSTOM [/QUOTE]
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Next build 375 something
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