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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
APS Stalker Hunter
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<blockquote data-quote="Fiftydriver" data-source="post: 1626402" data-attributes="member: 10"><p>Well here are the initial results from velocity testing with Ramshot LRT first ever test in my 300 Allen Xpress. The test rifle is quite similar to the Stalker Hunter in this post, 26" barrel length. Ammo loaded to relatively short 3.680" oal for use in the HS Precision detachable mag system.</p><p></p><p>For a bit of reference, in this length barrel, and with the 215 gr. Berger which was tested today, Retumbo will generally get you 3275 fps. RL33 will get similar velocities but with a bit less pressure. RL33 will run out of capacity before pressuring out with this bullet weight.</p><p></p><p>Another point of reference, my personal 30" 300 Allen Xpress rifle will produce 3350 fps with 106.0 gr. RL33.</p><p></p><p>In this much shorter barrel i started testing at 104.0 gr. of LRT and worked up from there. Here are the results:</p><p></p><p>104.0 gr........3103 fps</p><p>105.0 gr........3118 fps</p><p>106.0 gr........3132 fps</p><p>107.0 gr........3158 fps</p><p>108.0 gr........3168 fps</p><p>109.0 gr........3208 fps</p><p>110.0 gr........3250 fps</p><p>111.0 gr........3267 fps</p><p>112.0 gr........3320 fps</p><p>113.0 gr........3391 fps. **faint hint of ejector ring</p><p></p><p>Primer pockets held tight and unchanged with all loads tested. LRT worked up in a very similar way as in the 7mm Allen Magnum. Velocity gains were very small at the beginning of the test but as pressures slowly work into good working pressures the velocity gains start to come.</p><p></p><p>I have always found this when using the slow ball powders as opposed to stock powders. Generally with stick powders you will see a more significant velocity gain per grain of powder throughout the load development process. These ball powders however gain pressures very lazily until top working pressures are reached then the gains come.</p><p></p><p>I personally feel this is due to the fact that the stick powders offer more resistance as they are forced through the neck of the case whereas ball powders flow like water offering very little resistence.</p><p></p><p>I also feel this is why ball powders burn very dirty until you reach top working pressures. </p><p></p><p>Anyway, very happy with the results. Solid 100-120 fps gains over Retumbo and RL33. In fact this LRT load in a 26" barrel is out running my RL33 load in a full 30" barrel.</p><p></p><p>As far as use with the 181 gr hammer. It is my opinion that this powder will not pressure up with this bullet before running out of case capacity mainly because of the light bullet weight and the low engraving force these bullets need to start down the bore.</p><p></p><p>Certainly worth a try but suspect to slow. Even with the 215 gr. top powder charges were lightly compressed..... the 230 gr or new 250 gr hornady would likely result in a nearly ideal combination, similar to the 7mm Allen Magnum with the 180 and 195 gr bullet weights with this new powder.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 1626402, member: 10"] Well here are the initial results from velocity testing with Ramshot LRT first ever test in my 300 Allen Xpress. The test rifle is quite similar to the Stalker Hunter in this post, 26” barrel length. Ammo loaded to relatively short 3.680” oal for use in the HS Precision detachable mag system. For a bit of reference, in this length barrel, and with the 215 gr. Berger which was tested today, Retumbo will generally get you 3275 fps. RL33 will get similar velocities but with a bit less pressure. RL33 will run out of capacity before pressuring out with this bullet weight. Another point of reference, my personal 30” 300 Allen Xpress rifle will produce 3350 fps with 106.0 gr. RL33. In this much shorter barrel i started testing at 104.0 gr. of LRT and worked up from there. Here are the results: 104.0 gr........3103 fps 105.0 gr........3118 fps 106.0 gr........3132 fps 107.0 gr........3158 fps 108.0 gr........3168 fps 109.0 gr........3208 fps 110.0 gr........3250 fps 111.0 gr........3267 fps 112.0 gr........3320 fps 113.0 gr........3391 fps. **faint hint of ejector ring Primer pockets held tight and unchanged with all loads tested. LRT worked up in a very similar way as in the 7mm Allen Magnum. Velocity gains were very small at the beginning of the test but as pressures slowly work into good working pressures the velocity gains start to come. I have always found this when using the slow ball powders as opposed to stock powders. Generally with stick powders you will see a more significant velocity gain per grain of powder throughout the load development process. These ball powders however gain pressures very lazily until top working pressures are reached then the gains come. I personally feel this is due to the fact that the stick powders offer more resistance as they are forced through the neck of the case whereas ball powders flow like water offering very little resistence. I also feel this is why ball powders burn very dirty until you reach top working pressures. Anyway, very happy with the results. Solid 100-120 fps gains over Retumbo and RL33. In fact this LRT load in a 26” barrel is out running my RL33 load in a full 30” barrel. As far as use with the 181 gr hammer. It is my opinion that this powder will not pressure up with this bullet before running out of case capacity mainly because of the light bullet weight and the low engraving force these bullets need to start down the bore. Certainly worth a try but suspect to slow. Even with the 215 gr. top powder charges were lightly compressed..... the 230 gr or new 250 gr hornady would likely result in a nearly ideal combination, similar to the 7mm Allen Magnum with the 180 and 195 gr bullet weights with this new powder. [/QUOTE]
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