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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics beyond 2000 yds : do we need/trust them?
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<blockquote data-quote="Michael Eichele" data-source="post: 138772" data-attributes="member: 1007"><p>Eaglet,</p><p></p><p>To go along with what GG said about the BC changing with the decay of barrel quality over time, you also add in ever changing components such as powder lot number and burn rate. Example, my 308 had an awesome load using the 155 AMAX and BENCHMARK powder. Velocity was 2850 (average). When that powder got used up, I bought more. I now shoot the same powder charge (because it is by far the most accurate) but the differance is I get only 2717 FPS on average now. 133 FPS differant. Trust me, the BC changes as well with that velocity change. Does it change enough for me to worry about at ranges I will be asking that load to perform at? No. If the velocity were much higher though and could utilize that load at say 1300+ yards, and had the same small change in BC, yeah, I would find out what it was exactly, plug that into my software, and hit my target with confidence.</p><p></p><p>Regards!</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 138772, member: 1007"] Eaglet, To go along with what GG said about the BC changing with the decay of barrel quality over time, you also add in ever changing components such as powder lot number and burn rate. Example, my 308 had an awesome load using the 155 AMAX and BENCHMARK powder. Velocity was 2850 (average). When that powder got used up, I bought more. I now shoot the same powder charge (because it is by far the most accurate) but the differance is I get only 2717 FPS on average now. 133 FPS differant. Trust me, the BC changes as well with that velocity change. Does it change enough for me to worry about at ranges I will be asking that load to perform at? No. If the velocity were much higher though and could utilize that load at say 1300+ yards, and had the same small change in BC, yeah, I would find out what it was exactly, plug that into my software, and hit my target with confidence. Regards! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics beyond 2000 yds : do we need/trust them?
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