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Rifles, Reloading, Optics, Equipment
Reloading
Bullet weld
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<blockquote data-quote="Bob Wright" data-source="post: 1808361" data-attributes="member: 104363"><p>So, the curiosity was eating at me. I loaded some hunting ammo in October 2018. I shot it at 600 for a drop test at distance. It was vertically spread out 7".</p><p>I ran another test today to see what changes it would make by:</p><p>-Shooting 5 with nothing done,</p><p>-5 with bullets pulled out completely, check weight of charges, neck size, re- seat,</p><p>- 5 more with bullets pulled up .050 and re-seated with no neck size.</p><p>I didn't notice any "sticky" condition so "bullet weld" is not at play.</p><p>The velocity avg and SD did change, ES is high at ~20FPS avg.</p><p>The group shapes and location moves vertically, with flyers.</p><p>This load was never developed for tuning at this range. I was doing my usual development at 200 and they all are repeatable and all touching.</p><p>I believe my vertical stringing is more of a missed accuracy node and neck sizing "only" issue.</p><p>Lesson learned: need to always test at distances I intend to shoot, record on paper targets and tweak.</p><p>I'll try the ladder test again with full length sizing first, and see where an accuracy node might really be. Start from there and just keep trying one variable at a time.</p><p>7mm RM</p><p>175 LRAB</p><p>Fed 215 primers</p><p>RE23 powder</p><p>Nosler brass, annealed, neck sized, neck turned for .004 diametral clearance, fire formed.</p><p>26" Krieger 8.5 twist heavy sporter.</p></blockquote><p></p>
[QUOTE="Bob Wright, post: 1808361, member: 104363"] So, the curiosity was eating at me. I loaded some hunting ammo in October 2018. I shot it at 600 for a drop test at distance. It was vertically spread out 7". I ran another test today to see what changes it would make by: -Shooting 5 with nothing done, -5 with bullets pulled out completely, check weight of charges, neck size, re- seat, - 5 more with bullets pulled up .050 and re-seated with no neck size. I didn't notice any "sticky" condition so "bullet weld" is not at play. The velocity avg and SD did change, ES is high at ~20FPS avg. The group shapes and location moves vertically, with flyers. This load was never developed for tuning at this range. I was doing my usual development at 200 and they all are repeatable and all touching. I believe my vertical stringing is more of a missed accuracy node and neck sizing "only" issue. Lesson learned: need to always test at distances I intend to shoot, record on paper targets and tweak. I'll try the ladder test again with full length sizing first, and see where an accuracy node might really be. Start from there and just keep trying one variable at a time. 7mm RM 175 LRAB Fed 215 primers RE23 powder Nosler brass, annealed, neck sized, neck turned for .004 diametral clearance, fire formed. 26" Krieger 8.5 twist heavy sporter. [/QUOTE]
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Bullet weld
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