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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Any Tips for a New Loadbase User?
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<blockquote data-quote="Pdvdh" data-source="post: 393094" data-attributes="member: 4191"><p>Some reasons I can think of for allowing different Environment Conditions - Sight In values in LB3 is that different bullet manufacturers reference their advertised BC to different environmental conditions. Sierra uses slightly different environmental conditions as a reference for their published BCs than Berger or Nosler.</p><p></p><p>Changing the Environment Conditions - Sight In values to any value other than the reference values that were used to establish the BC of the bullet will cause input error which will be reflected in the program's output values.</p><p></p><p>LB3 allows us to calculate the ICAO referenced BC for bullet BCs that were established at non-ICAO reference values. So if I shoot over my chronographs to determine a velocity difference based BC - over say 1000 yds - and my velocity data is collected at under non-ICAO environmental conditions, LB3 will then allow me to convert my non-standardized BC into a BC value referenced to ICAO Standard Conditions. And the reason I would want to do that is because LB3 is programmed referencing the ICAO Standard Conditions. So as stated earlier, if I use the LB3 Spin Drift feature (I do) and I want LB3 to properly tweak my predicted dope based on a Stability Factor (SG value) determined using the Analyzer Module "Miller Method", that SG value is referenced to the ICAO Standard Condition environmental values. The Spin Drift corrected dope values will only be calculated properly if the BC value entered for my bullet is referenced to the ICAO Standard Condition values, AND my entered 'Environmental Condtions - Sight In' values are input as 92.92 in/Hg, 59F, and 0%RH. </p><p></p><p>This would be a prime opportunity for Gus to get us all lined out on this important aspect of the proper use of his software. I don't know how often he visits this Forum. I'm sure he'd be willing to post if one of us e-mailed him and solicited his instruction on this matter. </p><p></p><p><strong><u>It's critical</u></strong> to match the 'Environmental Conditions - Sight In' input values to the reference environmental conditions that the bullet's BC is published for. Otherwise we essentially cluster the bullet's correct advertised BC, and end up with the garbage in - garbage out scenario.</p><p></p><p>Good attitude. All I'm interested in is that we all become most proficient in in the use of LB3, so we get all the software has to offer - which is a LOT. This software yields very accurate output if we enter the input correctly.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 393094, member: 4191"] Some reasons I can think of for allowing different Environment Conditions - Sight In values in LB3 is that different bullet manufacturers reference their advertised BC to different environmental conditions. Sierra uses slightly different environmental conditions as a reference for their published BCs than Berger or Nosler. Changing the Environment Conditions - Sight In values to any value other than the reference values that were used to establish the BC of the bullet will cause input error which will be reflected in the program's output values. LB3 allows us to calculate the ICAO referenced BC for bullet BCs that were established at non-ICAO reference values. So if I shoot over my chronographs to determine a velocity difference based BC - over say 1000 yds - and my velocity data is collected at under non-ICAO environmental conditions, LB3 will then allow me to convert my non-standardized BC into a BC value referenced to ICAO Standard Conditions. And the reason I would want to do that is because LB3 is programmed referencing the ICAO Standard Conditions. So as stated earlier, if I use the LB3 Spin Drift feature (I do) and I want LB3 to properly tweak my predicted dope based on a Stability Factor (SG value) determined using the Analyzer Module "Miller Method", that SG value is referenced to the ICAO Standard Condition environmental values. The Spin Drift corrected dope values will only be calculated properly if the BC value entered for my bullet is referenced to the ICAO Standard Condition values, AND my entered 'Environmental Condtions - Sight In' values are input as 92.92 in/Hg, 59F, and 0%RH. This would be a prime opportunity for Gus to get us all lined out on this important aspect of the proper use of his software. I don't know how often he visits this Forum. I'm sure he'd be willing to post if one of us e-mailed him and solicited his instruction on this matter. [B][U]It's critical[/U][/B] to match the 'Environmental Conditions - Sight In' input values to the reference environmental conditions that the bullet's BC is published for. Otherwise we essentially cluster the bullet's correct advertised BC, and end up with the garbage in - garbage out scenario. Good attitude. All I'm interested in is that we all become most proficient in in the use of LB3, so we get all the software has to offer - which is a LOT. This software yields very accurate output if we enter the input correctly. [/QUOTE]
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Any Tips for a New Loadbase User?
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