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Long Range Hunting & Shooting
338 Allen Xpress, RL33 load development
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<blockquote data-quote="Fiftydriver" data-source="post: 847512" data-attributes="member: 10"><p>I assume your using the 505 gibbs case??</p><p> </p><p>You have fun shortening that one and necking down to 30 cal!!!</p><p> </p><p>The Gibbs case is not generally made to handle much more then 50,000 psi so you may run out of case strength pretty soon. For your sake, I hope I am wrong.</p><p> </p><p>When I was working with testing my 300 Allen Magnum, I tested it at the full length 3.050" case length, 2.850" case length and finally I shortened it back to 2.750".</p><p> </p><p>The shorter length cases may have worked but they were a lot of work to shorten the brass and I had no desire to pay to have a large supply of custom brass made at that time. Shortened to 2.750", it had slightly larger case capacity then the 30-378 Wby case but still required a full Chey Tac receiver because of the case diameter so I did not see a reason to move forward with that project.</p><p> </p><p>The 300 Raptor may also be to large in capacity, have to run that one through the wringer and find out what it will do but at least that one can be chambered in a conventional sized receiver and should outperform the 300 AX and 30-378 Wby by a fair margin with bullets in the 200-240 gr range.</p><p> </p><p>Have fun with your project, keep us posted.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 847512, member: 10"] I assume your using the 505 gibbs case?? You have fun shortening that one and necking down to 30 cal!!! The Gibbs case is not generally made to handle much more then 50,000 psi so you may run out of case strength pretty soon. For your sake, I hope I am wrong. When I was working with testing my 300 Allen Magnum, I tested it at the full length 3.050" case length, 2.850" case length and finally I shortened it back to 2.750". The shorter length cases may have worked but they were a lot of work to shorten the brass and I had no desire to pay to have a large supply of custom brass made at that time. Shortened to 2.750", it had slightly larger case capacity then the 30-378 Wby case but still required a full Chey Tac receiver because of the case diameter so I did not see a reason to move forward with that project. The 300 Raptor may also be to large in capacity, have to run that one through the wringer and find out what it will do but at least that one can be chambered in a conventional sized receiver and should outperform the 300 AX and 30-378 Wby by a fair margin with bullets in the 200-240 gr range. Have fun with your project, keep us posted. [/QUOTE]
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338 Allen Xpress, RL33 load development
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