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Rifles, Reloading, Optics, Equipment
Reloading
H4895 temp sensitivity
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<blockquote data-quote="Pdvdh" data-source="post: 1182923" data-attributes="member: 4191"><p>Nope. This is an AR-15 and I'm limited to 2.260" OAL by Magpul magazine design. So I don't have much latitude changing bullet seating depths.</p><p></p><p>I meant to include this information. After completing a lot of load development focused on finding a powder/charge/load combination that would lower my ES/SD without much success, I Google researched ES/SD with AR-15 .223 ammo to read what others' experiences were. I did read several Posts in threads stating that Varget was finicky in the .223 Remington compared to larger case capacity cartridges. I also read that some folks thought there was benefit to crimping bullets in their .223 ammo - for use in AR-15s. </p><p></p><p>So I purchased a Lee Factory Crimp Die in order to test the theory that crimping the bullets would produce more uniform powder ignition and reduce ES/SD. I tried this with two loads, 26.8gr Hodgdon BL-C(2) and 24.9gr Benchmark. I then shot crimped versus no crimp loads over the chronographs into 300yd targets. </p><p></p><p>I didn't see much difference one way or the other with respect to ES/SD. HOWEVER, believe it or not, the crimped <strong>Benchmark</strong> bullets printed a group about 1/2 the size of the same load with bullets that were not crimped. I fired 6 crimped shells into a group measuring about 2.5". I fired 6 no-crimp bullets into a group measuring about 5". I then fired another 5 no-crimp bullets to further verify the reduced accuracy, and the no-crimp group remained the same at about 5". </p><p></p><p>Crimping the bullets didn't cause much difference in ES/SD, which is what I was looking for, but the crimped bullets did shoot a group about 1/2 the size of the groups printed with no-crimp bullets. Again, this was with Benchmark powder.</p><p></p><p>With BL-C(2), I didn't see much difference between accuracy or ES/SD of the crimped/no-crimp bullets.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1182923, member: 4191"] Nope. This is an AR-15 and I'm limited to 2.260" OAL by Magpul magazine design. So I don't have much latitude changing bullet seating depths. I meant to include this information. After completing a lot of load development focused on finding a powder/charge/load combination that would lower my ES/SD without much success, I Google researched ES/SD with AR-15 .223 ammo to read what others' experiences were. I did read several Posts in threads stating that Varget was finicky in the .223 Remington compared to larger case capacity cartridges. I also read that some folks thought there was benefit to crimping bullets in their .223 ammo - for use in AR-15s. So I purchased a Lee Factory Crimp Die in order to test the theory that crimping the bullets would produce more uniform powder ignition and reduce ES/SD. I tried this with two loads, 26.8gr Hodgdon BL-C(2) and 24.9gr Benchmark. I then shot crimped versus no crimp loads over the chronographs into 300yd targets. I didn't see much difference one way or the other with respect to ES/SD. HOWEVER, believe it or not, the crimped [B]Benchmark[/B] bullets printed a group about 1/2 the size of the same load with bullets that were not crimped. I fired 6 crimped shells into a group measuring about 2.5". I fired 6 no-crimp bullets into a group measuring about 5". I then fired another 5 no-crimp bullets to further verify the reduced accuracy, and the no-crimp group remained the same at about 5". Crimping the bullets didn't cause much difference in ES/SD, which is what I was looking for, but the crimped bullets did shoot a group about 1/2 the size of the groups printed with no-crimp bullets. Again, this was with Benchmark powder. With BL-C(2), I didn't see much difference between accuracy or ES/SD of the crimped/no-crimp bullets. [/QUOTE]
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H4895 temp sensitivity
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