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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Sherman Wildcat Reloading Data is Here!!!
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<blockquote data-quote="Winny94" data-source="post: 1717389" data-attributes="member: 97079"><p>So per Berger's advice, I found the rough seating depth first (which ended up being .090" jump). Since I have a short freebore chamber, the .090" ended up at a COAL of ~2.805. As you can imagine, that put the bullet in the powder column more than I would prefer. I ran tests from 58-62.4gr. I started compressing loads at 61.2, so moved to using a drop tube. These were some of the most consistent loads ive ever tested and it was crazy accurate as well (of the 12 different loads, 10 had an ES of 17 or less, and 6 had an ES in the single digits.) But the issue is they are incredibly slow - my 62.4gr load had an ES of 8, but is only moving at 2835 fps. </p><p>My question is; could the long jump be leading to lower pressure i.e. lower velocity? Or is my chrono lying to me? Slow barrel?</p><p></p><p>I have a hunt next week, so this will be the load I run with for this hunt, but I do plan to rework it later this fall if I can. I may need to try a new bullet thats less jump sensitive (175gr berger). Just looking for some opinions on why its so slow.</p><p></p><p>Specs:</p><p>ADG Headstamped Brass</p><p>180gr Berger VLD Hunting</p><p>Federal 210M</p><p>H1000</p><p>.090" Jump (2.0425 CBTO / ~2.805" COAL)</p></blockquote><p></p>
[QUOTE="Winny94, post: 1717389, member: 97079"] So per Berger's advice, I found the rough seating depth first (which ended up being .090" jump). Since I have a short freebore chamber, the .090" ended up at a COAL of ~2.805. As you can imagine, that put the bullet in the powder column more than I would prefer. I ran tests from 58-62.4gr. I started compressing loads at 61.2, so moved to using a drop tube. These were some of the most consistent loads ive ever tested and it was crazy accurate as well (of the 12 different loads, 10 had an ES of 17 or less, and 6 had an ES in the single digits.) But the issue is they are incredibly slow - my 62.4gr load had an ES of 8, but is only moving at 2835 fps. My question is; could the long jump be leading to lower pressure i.e. lower velocity? Or is my chrono lying to me? Slow barrel? I have a hunt next week, so this will be the load I run with for this hunt, but I do plan to rework it later this fall if I can. I may need to try a new bullet thats less jump sensitive (175gr berger). Just looking for some opinions on why its so slow. Specs: ADG Headstamped Brass 180gr Berger VLD Hunting Federal 210M H1000 .090" Jump (2.0425 CBTO / ~2.805" COAL) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Sherman Wildcat Reloading Data is Here!!!
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