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Rifles, Reloading, Optics, Equipment
Reloading
12 Twist 22-250/69g SMK h/t Michael Courtney
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<blockquote data-quote="benchracer" data-source="post: 1072923" data-attributes="member: 22069"><p>69 SMK/38.2 RL-17</p><p> </p><p>AVG 3618</p><p>ES 47</p><p>SD 13</p><p> </p><p> </p><p>I have attached the QL predictions. Note the large discrepancy between predicted and actual powder charges for the measured velocity. </p><p> </p><p>The relevant OBT nodes are predicted to fall at .978ms and 1.110ms. This particular load did not fall on an OBT-predicted node, coming in around 1.050ms. When the projected powder charges are corrected vs actual, it appears the 37.3 grain powder charge would fall close to the predicted OBT node at 1.110ms. </p><p> </p><p>I intend to chrono the 37.3 grain load to see what ES and SD numbers look like. However, with SD running at .36% for the 38.2 grain load, I am not sure it will be worth it to sacrifice approximately 100 fps for a questionable gain in accuracy over an already excellent load. It will be interesting to see what actual shooting results have to say on the matter.</p></blockquote><p></p>
[QUOTE="benchracer, post: 1072923, member: 22069"] 69 SMK/38.2 RL-17 AVG 3618 ES 47 SD 13 I have attached the QL predictions. Note the large discrepancy between predicted and actual powder charges for the measured velocity. The relevant OBT nodes are predicted to fall at .978ms and 1.110ms. This particular load did not fall on an OBT-predicted node, coming in around 1.050ms. When the projected powder charges are corrected vs actual, it appears the 37.3 grain powder charge would fall close to the predicted OBT node at 1.110ms. I intend to chrono the 37.3 grain load to see what ES and SD numbers look like. However, with SD running at .36% for the 38.2 grain load, I am not sure it will be worth it to sacrifice approximately 100 fps for a questionable gain in accuracy over an already excellent load. It will be interesting to see what actual shooting results have to say on the matter. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
12 Twist 22-250/69g SMK h/t Michael Courtney
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