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Accubond LR Comparison and G7 BC Test
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<blockquote data-quote="MMERSS" data-source="post: 818553" data-attributes="member: 63748"><p><span style="font-size: 10px">I loaded 210 ABLR's for my 308 to test in a lower velocity band compared to the 300 RUM. Load development was not conducted. Muzzle Velocity Variation was high on these loads, thus I was expecting vertical stings. Here are the results.</span></p><p> </p><p><span style="font-size: 10px">[ATTACH]22700[/ATTACH]</span></p><p><span style="font-size: 10px">205 yard zero- 5 shot group followed by a confirmation shot</span></p><p><span style="font-size: 10px">Average MV 2405</span></p><p><span style="font-size: 10px">SD17</span></p><p><span style="font-size: 10px">ES41</span></p><p><span style="font-size: 10px">DA 6300</span></p><p><span style="font-size: 10px">Baro 29.86</span></p><p><span style="font-size: 10px">Temp 70</span></p><p><span style="font-size: 10px">Hum 23</span></p><p><span style="font-size: 10px">Alt 4520 </span></p><p> </p><p><span style="font-size: 10px">[ATTACH]22701[/ATTACH]</span></p><p><span style="font-size: 10px">I used .321 for the G7 BC </span></p><p><span style="font-size: 10px">Range 641 yards</span></p><p><span style="font-size: 10px">DA 6700</span></p><p><span style="font-size: 10px">Elevation MOA 16.0 applied to scope</span></p><p><span style="font-size: 10px">7 MPH wind, 170 deg at shooting location, mirage estimate 1 MOA Right to Left</span></p><p><span style="font-size: 10px">Estimated full value cross wind variation at target up to 1 MPH</span></p><p><span style="font-size: 10px">5 shots</span></p><p> </p><p><span style="font-size: 10px">[ATTACH]22702[/ATTACH]</span></p><p><span style="font-size: 10px">Range 1005 yards</span></p><p><span style="font-size: 10px">DA 6700</span></p><p><span style="font-size: 10px">Elevation MOA 34.125 applied to scope (I have 1/8 minute dials)</span></p><p><span style="font-size: 10px">8 MPH winds, mirage estimate initially 2 MOA Right to Left then switched during string Left to Right. I did not hold for change in mirage thru the 5 shot string.</span></p><p><span style="font-size: 10px">Steinert Acoustic Chronograph placed under target. Average velocity 1430 ft/s</span></p><p><span style="font-size: 10px">5 shots</span></p><p> </p><p><span style="font-size: 10px">Adjustments made to ballistics solution:</span></p><p><span style="font-size: 10px">MV adjusted to 2409</span></p><p> </p><p>Computer Solution</p><p>Distance, Velocity, TOF(SEC), Energy, PathMOA, WindMOA10, SpinMOA</p><p>0000 2409 0.00 2705 00.0 000 000</p><p>0640 1753 0.93 1440 15.8 3.6 0.5</p><p>1005 1437 1.62 0963 34.2 6.2 0.9</p><p> </p><p>In some aspects, a G7 BC of .318 was a better fit to the 1005 yard range without needing adjustment to the velocity for a solution.</p><p> </p><p><span style="font-size: 10px">Special thanks to Broz for setting up and running the range and MontanaRifleman for the assistance and use of his Steinert.</span></p></blockquote><p></p>
[QUOTE="MMERSS, post: 818553, member: 63748"] [SIZE=2]I loaded 210 ABLR’s for my 308 to test in a lower velocity band compared to the 300 RUM. Load development was not conducted. Muzzle Velocity Variation was high on these loads, thus I was expecting vertical stings. Here are the results.[/SIZE] [SIZE=2][ATTACH]22700.vB[/ATTACH][/SIZE] [SIZE=2]205 yard zero- 5 shot group followed by a confirmation shot[/SIZE] [SIZE=2]Average MV 2405[/SIZE] [SIZE=2]SD17[/SIZE] [SIZE=2]ES41[/SIZE] [SIZE=2]DA 6300[/SIZE] [SIZE=2]Baro 29.86[/SIZE] [SIZE=2]Temp 70[/SIZE] [SIZE=2]Hum 23[/SIZE] [SIZE=2]Alt 4520 [/SIZE] [SIZE=2][ATTACH]22701.vB[/ATTACH][/SIZE] [SIZE=2]I used .321 for the G7 BC [/SIZE] [SIZE=2]Range 641 yards[/SIZE] [SIZE=2]DA 6700[/SIZE] [SIZE=2]Elevation MOA 16.0 applied to scope[/SIZE] [SIZE=2]7 MPH wind, 170 deg at shooting location, mirage estimate 1 MOA Right to Left[/SIZE] [SIZE=2]Estimated full value cross wind variation at target up to 1 MPH[/SIZE] [SIZE=2]5 shots[/SIZE] [SIZE=2][ATTACH]22702.vB[/ATTACH][/SIZE] [SIZE=2]Range 1005 yards[/SIZE] [SIZE=2]DA 6700[/SIZE] [SIZE=2]Elevation MOA 34.125 applied to scope (I have 1/8 minute dials)[/SIZE] [SIZE=2]8 MPH winds, mirage estimate initially 2 MOA Right to Left then switched during string Left to Right. I did not hold for change in mirage thru the 5 shot string.[/SIZE] [SIZE=2]Steinert Acoustic Chronograph placed under target. Average velocity 1430 ft/s[/SIZE] [SIZE=2]5 shots[/SIZE] [SIZE=2]Adjustments made to ballistics solution:[/SIZE] [SIZE=2]MV adjusted to 2409[/SIZE] Computer Solution Distance, Velocity, TOF(SEC), Energy, PathMOA, WindMOA10, SpinMOA 0000 2409 0.00 2705 00.0 000 000 0640 1753 0.93 1440 15.8 3.6 0.5 1005 1437 1.62 0963 34.2 6.2 0.9 In some aspects, a G7 BC of .318 was a better fit to the 1005 yard range without needing adjustment to the velocity for a solution. [SIZE=2]Special thanks to Broz for setting up and running the range and MontanaRifleman for the assistance and use of his Steinert.[/SIZE] [/QUOTE]
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