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Rifles, Reloading, Optics, Equipment
Reloading
QL v3.6 just arrived and its conflicting info
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<blockquote data-quote="Pdvdh" data-source="post: 395370" data-attributes="member: 4191"><p>When I keep everything the same and increase bullet seating depth away from the lands, I see slower MVs over my chronographs. Consistently. I can't speak to QL as I don't own it.</p><p></p><p>What I experience is consistent with the loading instructions that come with the HAT bullets. Load up a maximum load with the bullet a bit off the lands. Then increase seating depth systematically while looking for a sweet spot. You'll never experience an excessive pressure load in this manner, as pressures go down. Therefore MV goes down by increasing the seating depth, with the powder charge kept constant. </p><p></p><p>So the hypothetical explanation of decreased case capacity = increased pressure does not result in increased MV in the experience of a number of other Threads I've read, or my own experiences shooting over reliable chronographs. I believe giving the bullet a jump start prior to hitting the lands more than offsets the effect of the reduced case capacity. I'll monitor this Thread and see if one of you can explain this line of reasoning, in light of the repetitive experiences of the tester of the HAT bullets. Every single time. Seat the bullet deeper, MVs decrease. That's why changing seating depths alone can be used as a technique for finding an accuracy node - rather than changing powder charges.</p><p></p><p>Now, I'm ready to be corrected...</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 395370, member: 4191"] When I keep everything the same and increase bullet seating depth away from the lands, I see slower MVs over my chronographs. Consistently. I can't speak to QL as I don't own it. What I experience is consistent with the loading instructions that come with the HAT bullets. Load up a maximum load with the bullet a bit off the lands. Then increase seating depth systematically while looking for a sweet spot. You'll never experience an excessive pressure load in this manner, as pressures go down. Therefore MV goes down by increasing the seating depth, with the powder charge kept constant. So the hypothetical explanation of decreased case capacity = increased pressure does not result in increased MV in the experience of a number of other Threads I've read, or my own experiences shooting over reliable chronographs. I believe giving the bullet a jump start prior to hitting the lands more than offsets the effect of the reduced case capacity. I'll monitor this Thread and see if one of you can explain this line of reasoning, in light of the repetitive experiences of the tester of the HAT bullets. Every single time. Seat the bullet deeper, MVs decrease. That's why changing seating depths alone can be used as a technique for finding an accuracy node - rather than changing powder charges. Now, I'm ready to be corrected... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
QL v3.6 just arrived and its conflicting info
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