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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Did some powder temp sensitivity tests today, interesting results.
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<blockquote data-quote="Michael Eichele" data-source="post: 246890" data-attributes="member: 1007"><p>Powder: RL-25</p><p></p><p>Bullet: 200 ACCUBOND (30 cal)</p><p></p><p>Powder temp 1: 71 Degrees F.</p><p></p><p>Velocity 1: 3219</p><p>Velocity 2: 3227</p><p>Velocity 3: 3218</p><p></p><p>Avg Vel: 3220</p><p>ES 9 FPS</p><p>Std Dev 4.93</p><p></p><p>Powder temp 2: -2 degrees F.</p><p></p><p>Velocity 1: 3213</p><p>Velocity 2: 3189</p><p>Velocity 3: 3205</p><p></p><p>Avg Vel: 3200</p><p></p><p>ES 24</p><p>Std Dev 12.2</p><p></p><p></p><p>The difference here was 20 FPS on average. Note that the barrel was never -2 degrees and was room temperature. The POI was the same (center to center), group at 71 was 1.6" @ 300 yards. Group at -2 was 2.99" @ 300 yards</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 246890, member: 1007"] Powder: RL-25 Bullet: 200 ACCUBOND (30 cal) Powder temp 1: 71 Degrees F. Velocity 1: 3219 Velocity 2: 3227 Velocity 3: 3218 Avg Vel: 3220 ES 9 FPS Std Dev 4.93 Powder temp 2: -2 degrees F. Velocity 1: 3213 Velocity 2: 3189 Velocity 3: 3205 Avg Vel: 3200 ES 24 Std Dev 12.2 The difference here was 20 FPS on average. Note that the barrel was never -2 degrees and was room temperature. The POI was the same (center to center), group at 71 was 1.6" @ 300 yards. Group at -2 was 2.99" @ 300 yards [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Did some powder temp sensitivity tests today, interesting results.
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