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Hunting
Long Range Hunting & Shooting
True BC of a 220MK
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<blockquote data-quote="Brent" data-source="post: 3056" data-attributes="member: 99"><p>I'll be running some through the Oehler 43 out of a 300 Ultra in the next few weeks, it will give a true BC for that speed and conditions. </p><p></p><p>If you have a GOOD cronograph and if you start with perfect 100 yard zero groups, then go to between 500 and 700 yards and measure the ACTUAL drop. Compare to a drop chart at the temp etc during shooting and now you have something to go with to click on out beyond this too.</p><p></p><p>I have always used a sheet of plywood standing vertical covered with butcher paper. Remember to measure the center of your groups for accurate results.</p></blockquote><p></p>
[QUOTE="Brent, post: 3056, member: 99"] I'll be running some through the Oehler 43 out of a 300 Ultra in the next few weeks, it will give a true BC for that speed and conditions. If you have a GOOD cronograph and if you start with perfect 100 yard zero groups, then go to between 500 and 700 yards and measure the ACTUAL drop. Compare to a drop chart at the temp etc during shooting and now you have something to go with to click on out beyond this too. I have always used a sheet of plywood standing vertical covered with butcher paper. Remember to measure the center of your groups for accurate results. [/QUOTE]
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True BC of a 220MK
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