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Rifles, Reloading, Optics, Equipment
Reloading
Load Development Interpretation
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<blockquote data-quote="Jud96" data-source="post: 2525993" data-attributes="member: 69478"><p>The more you test the same load, the more the ES will grow. Also, things like environmental changes, the accuracy of your reloading equipment, consistency of brass, etc all affect shot strings day in and day out. I focus on getting ES consistently under 25 FPS, even if it's consistently under 30 FPS for 5-10 shot strings that's good. Everyone wants ES in the teens or lower, but in reality if you have a node that's 0.5gr wide or more and your ES is consistently under 30, and the accuracy is 1/2 MOA, that's a serious long range load. You shouldn't have a problem making impacts out to 1000 yards with that level of load. It's rare to have a load repeat the same ES over and over. You're just seeing the broad spectrum of the loads performance on different occasions.</p><p></p><p>Similar points of impact are more due to barrel harmonics and not necessarily similar velocities. If you would shoot say 40.0-42.0 in 0.2-0.3gr increments for 3 shot groups from left to right on a row of targets, you could watch the groups raise and lower and then you'll see a flat spot and then the next group will shift the point of impact. I do this test, coupled with a velocity test with the same charges. When the flat spot in velocity aligns with a flat spot on paper, you have a winner. It's not always going to be miraculous with 3 loads having single digit ES and points of impact varying no more than 1/4". Most of the time you'll have a window where the ES between the multiple loads will be like 20-30fps and the points of impact are within 0.5-0.6". That doesn't sound beautiful, but the loads on either side of this window could have impact shifts as much as 1" difference. You're just looking to find the node and stick in the center of it. Then do a seating depth test to shrink your groups to the best you can get.</p></blockquote><p></p>
[QUOTE="Jud96, post: 2525993, member: 69478"] The more you test the same load, the more the ES will grow. Also, things like environmental changes, the accuracy of your reloading equipment, consistency of brass, etc all affect shot strings day in and day out. I focus on getting ES consistently under 25 FPS, even if it’s consistently under 30 FPS for 5-10 shot strings that’s good. Everyone wants ES in the teens or lower, but in reality if you have a node that’s 0.5gr wide or more and your ES is consistently under 30, and the accuracy is 1/2 MOA, that’s a serious long range load. You shouldn’t have a problem making impacts out to 1000 yards with that level of load. It’s rare to have a load repeat the same ES over and over. You’re just seeing the broad spectrum of the loads performance on different occasions. Similar points of impact are more due to barrel harmonics and not necessarily similar velocities. If you would shoot say 40.0-42.0 in 0.2-0.3gr increments for 3 shot groups from left to right on a row of targets, you could watch the groups raise and lower and then you’ll see a flat spot and then the next group will shift the point of impact. I do this test, coupled with a velocity test with the same charges. When the flat spot in velocity aligns with a flat spot on paper, you have a winner. It’s not always going to be miraculous with 3 loads having single digit ES and points of impact varying no more than 1/4”. Most of the time you’ll have a window where the ES between the multiple loads will be like 20-30fps and the points of impact are within 0.5-0.6”. That doesn’t sound beautiful, but the loads on either side of this window could have impact shifts as much as 1” difference. You’re just looking to find the node and stick in the center of it. Then do a seating depth test to shrink your groups to the best you can get. [/QUOTE]
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