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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet failures
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<blockquote data-quote="Petey308" data-source="post: 2402950" data-attributes="member: 106845"><p>Regarding stability with copper bullets, I did have a conversation with Bryan Litz about it at one point just to get confirmation of my own thinking on it, especially after reading some interesting claims in this very forum. Since the same weight copper bullet has to be longer than the same weight lead core bullet, due to the lack of density, it does need a higher stability factor in order to get its full BC potential and full stability. That said, they still don't really need to be pushed to anything over 2.0 to get proper results. That said, I do think a lot of people struggled in the beginning with copper bullets achieving proper stability by not having sufficient twist rate and MV, but the notion now I hear about needing an SG of 4.0 or more with bullets like Hammers is a bit silly. I've seen claims too that guys are having to set their ballistic calculators to BCs of up to 1.0 to get their POI to match the calculator. This was something I brought up with him as well. He agrees there's other factors there that are producing that error. Just thought this might be useful information <img class="smilie smilie--emoji" loading="lazy" alt="🤷🏼♂️" title="Man shrugging: medium-light skin tone :man_shrugging_tone2:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f937-1f3fc-2642.png" data-shortname=":man_shrugging_tone2:" /></p><p></p><p>Below are some screenshots of my conversation with Bryan. </p><p>[ATTACH=full]329953[/ATTACH]</p><p>[ATTACH=full]329954[/ATTACH]</p></blockquote><p></p>
[QUOTE="Petey308, post: 2402950, member: 106845"] Regarding stability with copper bullets, I did have a conversation with Bryan Litz about it at one point just to get confirmation of my own thinking on it, especially after reading some interesting claims in this very forum. Since the same weight copper bullet has to be longer than the same weight lead core bullet, due to the lack of density, it does need a higher stability factor in order to get its full BC potential and full stability. That said, they still don’t really need to be pushed to anything over 2.0 to get proper results. That said, I do think a lot of people struggled in the beginning with copper bullets achieving proper stability by not having sufficient twist rate and MV, but the notion now I hear about needing an SG of 4.0 or more with bullets like Hammers is a bit silly. I’ve seen claims too that guys are having to set their ballistic calculators to BCs of up to 1.0 to get their POI to match the calculator. This was something I brought up with him as well. He agrees there’s other factors there that are producing that error. Just thought this might be useful information 🤷🏼♂️ Below are some screenshots of my conversation with Bryan. [ATTACH type="full" alt="3DA16040-73D1-483D-A2F7-9433E70D24DA.jpeg"]329953[/ATTACH] [ATTACH type="full" alt="8C19CE2F-28FA-44B1-BCB8-A3626AE1C4BB.jpeg"]329954[/ATTACH] [/QUOTE]
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