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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: 112442" data-attributes="member: 319"><p>Well, now I feel really silly for not having the chronograph with me last time. </p><p></p><p>This barrel must be slick as snot. For a sanity check I clocked my old 200 AccuBond load with 95 grains of Retumbo. That load gave 3186 in the old 26" barrel. In the new 26.7" barrel it gave 3139. It looks like this barrel will take at least 2 grains more just to get back up to the speed of the old one.</p><p></p><p>I chronographed 7 rounds of 100 grains of US 869 behind the 240 SMK. Average velocity, 2879 fps. OK, I was being conservative, careful, etc which I'm all for...but now it's time to add some more powder!</p><p></p><p>It all makes sense now, the tiny bit of "feel" chambering the empty case from 102 grains before...<em>that's</em> what's normal. You ought to at least be able to <em>feel</em> you're chambering something. It's just all the rest were running at starting load pressures. That's what I think, anyway.</p><p></p><p>Time to start adding powder until I find the ceiling.</p></blockquote><p></p>
[QUOTE="Jon A, post: 112442, member: 319"] Well, now I feel really silly for not having the chronograph with me last time. This barrel must be slick as snot. For a sanity check I clocked my old 200 AccuBond load with 95 grains of Retumbo. That load gave 3186 in the old 26" barrel. In the new 26.7" barrel it gave 3139. It looks like this barrel will take at least 2 grains more just to get back up to the speed of the old one. I chronographed 7 rounds of 100 grains of US 869 behind the 240 SMK. Average velocity, 2879 fps. OK, I was being conservative, careful, etc which I'm all for...but now it's time to add some more powder! It all makes sense now, the tiny bit of "feel" chambering the empty case from 102 grains before...[i]that's[/i] what's normal. You ought to at least be able to [i]feel[/i] you're chambering something. It's just all the rest were running at starting load pressures. That's what I think, anyway. Time to start adding powder until I find the ceiling. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM, 240 SMK, US869 Initial Results
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