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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet failures
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<blockquote data-quote="RockyMtnMT" data-source="post: 2425887" data-attributes="member: 7999"><p>After our conversation on the phone. Thank you for calling! We did some low velocity impact testing with the 152g Hammer Hunter. This would be from the same lot of copper that your bullets came from last fall. Here is some pics of the recovered bullets.</p><p></p><p>[ATTACH]336553[/ATTACH][ATTACH]336554[/ATTACH]</p><p></p><p>I would not call these perfect performance, since they did not shed all of the petals at the low velocities. Definitely not a failure to deform. The 152g Hammer Hunter is one of our most difficult bullets to get full deformation and shed petals at low vel. This is due to the lower sectional density and the shorter nose radius that gains diameter quickly, making it pretty stout. This particular lot of copper wants to hang onto the petals a bit more than we would consider perfect. These impacts are fired at low vel giving the bullets less than full rpm's, inhibiting bullet performance compared to full velocity shots impacted at range. The impact velocities from your elk would have all been higher than these test impacts so it is reasonable to expect that full deformation took place. </p><p></p><p>The only conclusion after our conversation that I can come up with is that your bullet impacts that caused the elk to drop to the shot and then get back up, had to be close to the spine. I have only ever seen one elk drop on impact that was not hit in the spine. As a general rule if an elk is hit close to the spine it is not close to the vitals or is on the edge of the vitals. If not in the spine, breaking it, they will get back up. Uphill shots that are hitting on the high side are the toughest. They impact high and exit higher increasing the potential for this scenario. No finger pointing from me. I have been in these kind of situations and know exactly how things happen and how it feels.</p><p></p><p>On a different note, we have been in contact with our copper supplier voicing our needs on future copper orders and have reasonable expectations that our low vel impacts will do better than what I have pics of here.</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 2425887, member: 7999"] After our conversation on the phone. Thank you for calling! We did some low velocity impact testing with the 152g Hammer Hunter. This would be from the same lot of copper that your bullets came from last fall. Here is some pics of the recovered bullets. [ATTACH]336553[/ATTACH][ATTACH]336554[/ATTACH] I would not call these perfect performance, since they did not shed all of the petals at the low velocities. Definitely not a failure to deform. The 152g Hammer Hunter is one of our most difficult bullets to get full deformation and shed petals at low vel. This is due to the lower sectional density and the shorter nose radius that gains diameter quickly, making it pretty stout. This particular lot of copper wants to hang onto the petals a bit more than we would consider perfect. These impacts are fired at low vel giving the bullets less than full rpm's, inhibiting bullet performance compared to full velocity shots impacted at range. The impact velocities from your elk would have all been higher than these test impacts so it is reasonable to expect that full deformation took place. The only conclusion after our conversation that I can come up with is that your bullet impacts that caused the elk to drop to the shot and then get back up, had to be close to the spine. I have only ever seen one elk drop on impact that was not hit in the spine. As a general rule if an elk is hit close to the spine it is not close to the vitals or is on the edge of the vitals. If not in the spine, breaking it, they will get back up. Uphill shots that are hitting on the high side are the toughest. They impact high and exit higher increasing the potential for this scenario. No finger pointing from me. I have been in these kind of situations and know exactly how things happen and how it feels. On a different note, we have been in contact with our copper supplier voicing our needs on future copper orders and have reasonable expectations that our low vel impacts will do better than what I have pics of here. [/QUOTE]
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