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300 Tejas
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<blockquote data-quote="Fiftydriver" data-source="post: 380889" data-attributes="member: 10"><p>I have played with a couple round with shoulder angles over 40 degrees and in every case ran into problems when the brass got a few firings on them with high pressure loads. The shoulders would collapse when they needed to be bumped to set the shoulder back very slightly for proper chambering. </p><p> </p><p>With moderate loads this was not as significant but it did still occur but to a lesser degree.</p><p> </p><p>One was a 7mm on the 8mm Rem Mag case with a 50 degree shoulder and that rifle has some serious issues with pressure variations. You likely would never see this with a 338 cal and likely not with a 30 cal but I simply do not like a shoulder that steep</p><p> </p><p>It sounds like the 338 Tejas is identical in performance with the 338 Edge so personally I would not want to deal with the issues of the 50 degree shoulder for no real improvement in performance. The 338 Edge will get you 2850 fps to 2900 fps with the 300 gr SMK and there is no fireforming needed.</p><p> </p><p>If the 300 is the same as the 338 but necked down to 30 cal, it would seem to reason that it would be basically the same performance as the 300 RUM.</p><p> </p><p>Not saying they are not good rounds and I am sure the rifles are very good quality and good shooters but I just do not see alot of advantage improving a case that is already pretty well improved in design other then a sharper shoulder. This is why the performance increase is not significant over the parent case.</p><p> </p><p>Just my opinion, not trying to flame anyone, just saying what I have found using cases with shoulder sharper then 40 degrees.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 380889, member: 10"] I have played with a couple round with shoulder angles over 40 degrees and in every case ran into problems when the brass got a few firings on them with high pressure loads. The shoulders would collapse when they needed to be bumped to set the shoulder back very slightly for proper chambering. With moderate loads this was not as significant but it did still occur but to a lesser degree. One was a 7mm on the 8mm Rem Mag case with a 50 degree shoulder and that rifle has some serious issues with pressure variations. You likely would never see this with a 338 cal and likely not with a 30 cal but I simply do not like a shoulder that steep It sounds like the 338 Tejas is identical in performance with the 338 Edge so personally I would not want to deal with the issues of the 50 degree shoulder for no real improvement in performance. The 338 Edge will get you 2850 fps to 2900 fps with the 300 gr SMK and there is no fireforming needed. If the 300 is the same as the 338 but necked down to 30 cal, it would seem to reason that it would be basically the same performance as the 300 RUM. Not saying they are not good rounds and I am sure the rifles are very good quality and good shooters but I just do not see alot of advantage improving a case that is already pretty well improved in design other then a sharper shoulder. This is why the performance increase is not significant over the parent case. Just my opinion, not trying to flame anyone, just saying what I have found using cases with shoulder sharper then 40 degrees. [/QUOTE]
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