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Rifles, Reloading, Optics, Equipment
Reloading
Load Development Help/Opinions
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<blockquote data-quote="Pudgy" data-source="post: 2863831" data-attributes="member: 124264"><p>Everyone has their method. But here's mine. </p><p></p><p>1) I work on the powder/bullet combo. Im looking for a stable node with low Sd/ES. </p><p></p><p>I would work in .4 to .6 increments, when you find something to explore, you can come back and shoot the .2 or .3 between the .4/.6. IE say you do .6 and like a node between 65.2-65.8 come back and shoot 65.5. Now you have data for the whole range. </p><p></p><p>target is not really needed, but can provide useful data, chronograph is required. </p><p></p><p>2) Once I find the powder/ bullet, I test for best primer. Again target not needed, chrono is. </p><p></p><p>3) do seating depth test. Preferably at 600 yards. But can be done closer. </p><p></p><p>The seating depth is to tune your load, or change the timing when it exits the barrel. Closer to the lands it exits faster, and pressure/speeds will be faster, farther from the lands, not only does it exit slower, but speeds will also decrease. </p><p></p><p>it serves no purpose to tune the load and then do your powder and change everything up. You'll end up chasing your tail. </p><p></p><p>Here's a picture of one of my seating tests. Lost 15 fps, but found a wide seating node that should stay tuned for the life of the barrel. </p><p></p><p>But…..your not done yet. Now to take it out to distance and verify the load. </p><p>Shoot in different weather, ect. </p><p></p><p>I just had a "great load" fall apart at 1,000 yards in 95 degree weather. Because I skipped the primer test. </p><p></p><p>Last night I did the primer test in 95 degree weather on 7SAUM/180hybrid. </p><p></p><p>26 rounds in 15 minutes over .5 grains of powder, combined SD 6.3 - ES 23 and that's with a barrel that was at 159 degrees at the end of the test. </p><p></p><p>hope this is helpful in someway.</p></blockquote><p></p>
[QUOTE="Pudgy, post: 2863831, member: 124264"] Everyone has their method. But here’s mine. 1) I work on the powder/bullet combo. Im looking for a stable node with low Sd/ES. I would work in .4 to .6 increments, when you find something to explore, you can come back and shoot the .2 or .3 between the .4/.6. IE say you do .6 and like a node between 65.2-65.8 come back and shoot 65.5. Now you have data for the whole range. target is not really needed, but can provide useful data, chronograph is required. 2) Once I find the powder/ bullet, I test for best primer. Again target not needed, chrono is. 3) do seating depth test. Preferably at 600 yards. But can be done closer. The seating depth is to tune your load, or change the timing when it exits the barrel. Closer to the lands it exits faster, and pressure/speeds will be faster, farther from the lands, not only does it exit slower, but speeds will also decrease. it serves no purpose to tune the load and then do your powder and change everything up. You’ll end up chasing your tail. Here’s a picture of one of my seating tests. Lost 15 fps, but found a wide seating node that should stay tuned for the life of the barrel. But…..your not done yet. Now to take it out to distance and verify the load. Shoot in different weather, ect. I just had a “great load” fall apart at 1,000 yards in 95 degree weather. Because I skipped the primer test. Last night I did the primer test in 95 degree weather on 7SAUM/180hybrid. 26 rounds in 15 minutes over .5 grains of powder, combined SD 6.3 - ES 23 and that’s with a barrel that was at 159 degrees at the end of the test. hope this is helpful in someway. [/QUOTE]
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