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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM, 240 SMK, US869 Initial Results
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<blockquote data-quote="Jon A" data-source="post: 112594" data-attributes="member: 319"><p>Round II is complete. I chronographed one round each at the below charges. It was right at 70 degrees, chronograph was a Oehler M35 about 18' from the muzzle:</p><p></p><p>102 2971</p><p>103 2978</p><p>104 3023</p><p>105 3075 (slight pressure signs)</p><p></p><p>I shot one three shot group at 103 grains:</p><p></p><p><img src="http://www.jonaadland.com/Hunting/A-Bolt/Targets/240869103.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Average velocity, 3007 fps.</p><p></p><p>While I was surprised with the slickness of the new barrel, in the end this powder performed exactly as I had expected (or hoped) it would for this application. It'll easily match the speed, consistency and accuracy of H870. It'll beat Retumbo by a good 100 fps with this bullet. If it's nearly as temp stable as advertised, that will be a very valuable bonus (one reason I've shied away from WC872). The density is great of you've ever tried H50BMG--even the with the 104 grain load, the powder would still shake in the case even with the long 240 stuffed down to a 3.60" OAL (with fireformed cases this time). In short, a perfect replacement for H870. It's everything H870 was but better (H870 was pretty temp unstable), at least in this application.</p><p></p><p>I'd expect the typical 26" 300 RUM to top out around 99 grains in the 2950-2975 fps range with this bullet.</p><p></p><p>Now, the only piece of the puzzle that is missing for me is some heavier, higher BC bullets from Richard. I figure I can do around 2925 or so with a 250. If Richard can make one with a BC that blows away the 240, which is very possible, it'll take the old 300 RUM to the next level at extreme ranges. Of course, the 240 @ 3000 is no slouch in the meantime.</p></blockquote><p></p>
[QUOTE="Jon A, post: 112594, member: 319"] Round II is complete. I chronographed one round each at the below charges. It was right at 70 degrees, chronograph was a Oehler M35 about 18' from the muzzle: 102 2971 103 2978 104 3023 105 3075 (slight pressure signs) I shot one three shot group at 103 grains: [img]http://www.jonaadland.com/Hunting/A-Bolt/Targets/240869103.jpg[/img] Average velocity, 3007 fps. While I was surprised with the slickness of the new barrel, in the end this powder performed exactly as I had expected (or hoped) it would for this application. It'll easily match the speed, consistency and accuracy of H870. It'll beat Retumbo by a good 100 fps with this bullet. If it's nearly as temp stable as advertised, that will be a very valuable bonus (one reason I've shied away from WC872). The density is great of you've ever tried H50BMG--even the with the 104 grain load, the powder would still shake in the case even with the long 240 stuffed down to a 3.60" OAL (with fireformed cases this time). In short, a perfect replacement for H870. It's everything H870 was but better (H870 was pretty temp unstable), at least in this application. I'd expect the typical 26" 300 RUM to top out around 99 grains in the 2950-2975 fps range with this bullet. Now, the only piece of the puzzle that is missing for me is some heavier, higher BC bullets from Richard. I figure I can do around 2925 or so with a 250. If Richard can make one with a BC that blows away the 240, which is very possible, it'll take the old 300 RUM to the next level at extreme ranges. Of course, the 240 @ 3000 is no slouch in the meantime. [/QUOTE]
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Reloading
300 RUM, 240 SMK, US869 Initial Results
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