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Rifles, Reloading, Optics, Equipment
Reloading
Explain Sudden Velocity Increase PLEASE
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<blockquote data-quote="Doc88" data-source="post: 1359340" data-attributes="member: 98886"><p>So I'm working up a load for a 7STW RL 25 IN 0.5 grain increments. Get 3120 and 3123 fps between two half grain increments. Bullets pretty close in vertical. So there I am right. Load 5 rounds at 76.2gr. The above values were<span style="font-size: 16px"> at 76 and 76.5. First two shots in same hole at 200 yds at 3120 and 3123. Piddled around a bit adjusted the scope for the final 3 shots probably about 5 min. Outside is mild 60 degrees. Fourth shot boom 3145 and 2 inches high. Fourth and fifth shot 3141 and 3130 but shots were half inch apart back down on the aiming point. Assuming all loads loaded exactly the same with same amount of powder etc. where did that 3rd shot come from? </span></p><p><span style="font-size: 16px">On an aside I will be checking my RCBS chargemaster a little closer but it's regularly calibrated and rechecked. Rest of load info is 168 VLD at 3.640. </span></p><p><span style="font-size: 16px">Any help would be greatly appreciated. Thanks. </span></p></blockquote><p></p>
[QUOTE="Doc88, post: 1359340, member: 98886"] So I'm working up a load for a 7STW RL 25 IN 0.5 grain increments. Get 3120 and 3123 fps between two half grain increments. Bullets pretty close in vertical. So there I am right. Load 5 rounds at 76.2gr. The above values were[SIZE=16px] at 76 and 76.5. First two shots in same hole at 200 yds at 3120 and 3123. Piddled around a bit adjusted the scope for the final 3 shots probably about 5 min. Outside is mild 60 degrees. Fourth shot boom 3145 and 2 inches high. Fourth and fifth shot 3141 and 3130 but shots were half inch apart back down on the aiming point. Assuming all loads loaded exactly the same with same amount of powder etc. where did that 3rd shot come from? On an aside I will be checking my RCBS chargemaster a little closer but it's regularly calibrated and rechecked. Rest of load info is 168 VLD at 3.640. Any help would be greatly appreciated. Thanks. [/SIZE] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Explain Sudden Velocity Increase PLEASE
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