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Problems with magneto speed
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<blockquote data-quote="dfanonymous" data-source="post: 1535014" data-attributes="member: 97050"><p>Info on the box is a mere standard from the companies testing. In other words its a generalized suggestion.</p><p></p><p>If you know that you need a chronograph, then I can skip all the reasons different barrels and set ups make up different fps in MV. However since that is common knowledge, depending on what drag model you use, the difference in your MV and bullet flight will have whatever drag its going to to have on the bullet. </p><p></p><p>In other words, if you have a cartridge a using a g7 drag model with a projectile advertised for .321 bc at x fps...and come to find out you have a 2 inch longer barrel than the companies testing standards...you will have a slightly bigger bc then what you thought....and your input into your ballistic solver or phone app etc will not be perfectly aligned more than likely. Especially at further distances. </p><p></p><p>Your data will be close..but not spot on...sound familiar..? its what every noobie says on here when talking about ballistic apps. </p><p></p><p>The bc changes over the course of flight...the other gentleman you mentioned that the radar will show more bc data at distances is correct and that is what he is referring to. although a caveat to that is the labradar works alright for bc analysis at closer ranges...not so much for ranges that matter, which is a subjective statement ill admit. However its a personal choice to figure out data truing at close to far or far to close.</p></blockquote><p></p>
[QUOTE="dfanonymous, post: 1535014, member: 97050"] Info on the box is a mere standard from the companies testing. In other words its a generalized suggestion. If you know that you need a chronograph, then I can skip all the reasons different barrels and set ups make up different fps in MV. However since that is common knowledge, depending on what drag model you use, the difference in your MV and bullet flight will have whatever drag its going to to have on the bullet. In other words, if you have a cartridge a using a g7 drag model with a projectile advertised for .321 bc at x fps...and come to find out you have a 2 inch longer barrel than the companies testing standards...you will have a slightly bigger bc then what you thought....and your input into your ballistic solver or phone app etc will not be perfectly aligned more than likely. Especially at further distances. Your data will be close..but not spot on...sound familiar..? its what every noobie says on here when talking about ballistic apps. The bc changes over the course of flight...the other gentleman you mentioned that the radar will show more bc data at distances is correct and that is what he is referring to. although a caveat to that is the labradar works alright for bc analysis at closer ranges...not so much for ranges that matter, which is a subjective statement ill admit. However its a personal choice to figure out data truing at close to far or far to close. [/QUOTE]
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