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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
WARNING! ABOUT HORNADY ELD-X BULLETS
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<blockquote data-quote="Greyfox" data-source="post: 1406359" data-attributes="member: 10291"><p>As has been stated, Hornady is not the only bullet manufacturer that has lot to lot variations. I have found this to be the case with Berger, Sierra, and Nosler as well. I'm not talking about tip variations(bullet OL), long claimed to be present, and to have no effect on performance. As the OP has experienced, I have found that they can all may have lot to lot variations in "base to ogive", and other measurements as well. Sierra and Berger will fiddle with the various bullet dimensions so that a BTO variation as much as .035" will produce a loaded bullet length seating depth variation that may be on or within .010" of their standard, and require only a minor change in your seating dye setting. I just went through this with my PRS load using 130 Berger Tactical Hybrids. My first two lots were quite similar except for a less the .010" average tip length difference. The third lot had a BTO difference of .036", and a total cartridge to ogive(searing depth to the lands) difference of .007". With an additional .030" of bullet length in the case, velocity, ES, and accuracy had to be rechecked. The difference appeared to be the length of the boat tail. Accuracy and ES was the same but I had a 10FPS increase in velocity, likely due to the lower case capacity. Being suspect about the BC having changed due to the dimensional differences, the 1000 yard POI check was surprisingly OK. Having gone through all this BS, I was at least successful to get (2) 500ct boxes of the same lot....enough to probably last out what's left of my barrel. This was not the first time I have gone through this and I expect it won't be the last. With a new lot of bullets ai will always check the seating depth to the lands in my rifle, and the dimensions of the bullet. If I feel there that there is a material variation, I will run a basic ladder test at 200 yards, and a long range POI check to confirm the BC.</p><p></p><p>My ladder of the 130 Tactical Hybrid that indicated an average 10FPS increase with the new lot. My original load was 2880FPS at 41.2gr. Accuracy and ES proved to be the same. The seating depth was was increased 007" to achieve .015" off the lands.</p><p>[ATTACH=full]91221[/ATTACH]</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1406359, member: 10291"] As has been stated, Hornady is not the only bullet manufacturer that has lot to lot variations. I have found this to be the case with Berger, Sierra, and Nosler as well. I’m not talking about tip variations(bullet OL), long claimed to be present, and to have no effect on performance. As the OP has experienced, I have found that they can all may have lot to lot variations in “base to ogive”, and other measurements as well. Sierra and Berger will fiddle with the various bullet dimensions so that a BTO variation as much as .035” will produce a loaded bullet length seating depth variation that may be on or within .010” of their standard, and require only a minor change in your seating dye setting. I just went through this with my PRS load using 130 Berger Tactical Hybrids. My first two lots were quite similar except for a less the .010” average tip length difference. The third lot had a BTO difference of .036”, and a total cartridge to ogive(searing depth to the lands) difference of .007”. With an additional .030” of bullet length in the case, velocity, ES, and accuracy had to be rechecked. The difference appeared to be the length of the boat tail. Accuracy and ES was the same but I had a 10FPS increase in velocity, likely due to the lower case capacity. Being suspect about the BC having changed due to the dimensional differences, the 1000 yard POI check was surprisingly OK. Having gone through all this BS, I was at least successful to get (2) 500ct boxes of the same lot....enough to probably last out what’s left of my barrel. This was not the first time I have gone through this and I expect it won’t be the last. With a new lot of bullets ai will always check the seating depth to the lands in my rifle, and the dimensions of the bullet. If I feel there that there is a material variation, I will run a basic ladder test at 200 yards, and a long range POI check to confirm the BC. My ladder of the 130 Tactical Hybrid that indicated an average 10FPS increase with the new lot. My original load was 2880FPS at 41.2gr. Accuracy and ES proved to be the same. The seating depth was was increased 007” to achieve .015” off the lands. [ATTACH=full]91221[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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WARNING! ABOUT HORNADY ELD-X BULLETS
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