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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Calculating POI for Leupold Boone and Crockett Reticle
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<blockquote data-quote="Full Curl" data-source="post: 1087743" data-attributes="member: 47602"><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">Hi all.</span><span style="font-size: 12px"> </span><span style="font-size: 12px">I need some ballistic help from some of you much more knowledgeable and experienced marksmen.</span><span style="font-size: 12px"> </span><span style="font-size: 12px">I have a custom 7mm rem mag with a Leupold 4.5 x 14 x 40mm VX-III scope with the Boone and Crockett (B&C) reticle.</span><span style="font-size: 12px"> </span><span style="font-size: 12px">I have been shooting the gun well for a couple years, mostly under 300yds shots on game, but I'd like to try to take this setup to the next level and get comfortable in the 300-500yd or 600yd range.</span></span></p><p> </p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">At the 300 and 400 yard range using the corresponding hatch marks in the reticle using the large triangle, I am a bit off 6"+.</span><span style="font-size: 12px"> </span><span style="font-size: 12px">I'm sure some is shooter error but I'd like to take this step by step from the start since the load data in the cartridge Leupold shows doesn't match what I'm shooting.</span><span style="font-size: 12px"> </span><span style="font-size: 12px">Closest is the 150gr 3050fps in Group A (large triangle with a 200yd zero).</span></span></p><p> </p><p><span style="font-size: 12px"><span style="font-family: 'Calibri'">Here's Leupold's manual for its Ballistic Aiming System…</span></span></p><p><a href="http://www.leupold.com/wp-content/uploads/2014/09/BAS_Inst_Manual.pdf" target="_blank"><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #0000ff">[URL]http://www.leupold.com/wp-content/uploads/2014/09/BAS_Inst_Manual.pdf</span></span></span></a>[/URL]</p><p> </p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">I'm shooting a 160gr Accubond bullet and I'm using a 200yd zero.</span><span style="font-size: 12px"> </span><span style="font-size: 12px">I do not know my fps, but I have a chrono on order and will measure that as soon as I get it.</span></span></p><p> </p><p><span style="font-size: 12px"><span style="font-family: 'Calibri'">Once I have my fps and know my bullet's BC, I'd like to build a POI chart for each of the hatch marks in the reticle based on the scope set at specific power settings.</span></span></p><p> </p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">I've read some old posts on this subject and they reference a tool named "reticle tool" in a program named "Exbals".</span><span style="font-size: 12px"> </span><span style="font-size: 12px">I found the program but can no longer purchase it and emails to the company/developer have gone unanswered.</span></span></p><p> </p><p><span style="font-size: 12px"><span style="font-family: 'Calibri'">I'm hoping folks on this site can help walk me through this process of how to determine exact POI/MOA figures for each hatch mark in the reticle for my load at any given power setting.</span></span></p><p> </p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">Any and all help would be greatly appreciated!!</span><span style="font-size: 12px"> </span><span style="font-size: 12px">Thank you.</span></span></p></blockquote><p></p>
[QUOTE="Full Curl, post: 1087743, member: 47602"] [FONT=Calibri][SIZE=3]Hi all.[/SIZE][SIZE=3] [/SIZE][SIZE=3]I need some ballistic help from some of you much more knowledgeable and experienced marksmen.[/SIZE][SIZE=3] [/SIZE][SIZE=3]I have a custom 7mm rem mag with a Leupold 4.5 x 14 x 40mm VX-III scope with the Boone and Crockett (B&C) reticle.[/SIZE][SIZE=3] [/SIZE][SIZE=3]I have been shooting the gun well for a couple years, mostly under 300yds shots on game, but I’d like to try to take this setup to the next level and get comfortable in the 300-500yd or 600yd range.[/SIZE][/FONT] [FONT=Calibri][SIZE=3]At the 300 and 400 yard range using the corresponding hatch marks in the reticle using the large triangle, I am a bit off 6”+.[/SIZE][SIZE=3] [/SIZE][SIZE=3]I’m sure some is shooter error but I’d like to take this step by step from the start since the load data in the cartridge Leupold shows doesn’t match what I’m shooting.[/SIZE][SIZE=3] [/SIZE][SIZE=3]Closest is the 150gr 3050fps in Group A (large triangle with a 200yd zero).[/SIZE][/FONT] [SIZE=3][FONT=Calibri]Here’s Leupold’s manual for its Ballistic Aiming System…[/FONT][/SIZE][FONT=Calibri][SIZE=3][COLOR=#0000ff][/COLOR][/SIZE][/FONT] [URL="http://www.leupold.com/wp-content/uploads/2014/09/BAS_Inst_Manual.pdf"][FONT=Calibri][SIZE=3][COLOR=#0000ff][URL]http://www.leupold.com/wp-content/uploads/2014/09/BAS_Inst_Manual.pdf[/COLOR][/SIZE][/FONT][/URL][FONT=Calibri][SIZE=3][COLOR=#0000ff][/COLOR][/SIZE][/FONT][/URL][FONT=Calibri][SIZE=3][/SIZE][/FONT] [FONT=Calibri][SIZE=3][/SIZE][/FONT] [FONT=Calibri][SIZE=3]I’m shooting a 160gr Accubond bullet and I’m using a 200yd zero.[/SIZE][SIZE=3] [/SIZE][SIZE=3]I do not know my fps, but I have a chrono on order and will measure that as soon as I get it.[/SIZE][/FONT] [SIZE=3][FONT=Calibri]Once I have my fps and know my bullet’s BC, I’d like to build a POI chart for each of the hatch marks in the reticle based on the scope set at specific power settings.[/FONT][/SIZE] [FONT=Calibri][SIZE=3]I’ve read some old posts on this subject and they reference a tool named “reticle tool” in a program named “Exbals”.[/SIZE][SIZE=3] [/SIZE][SIZE=3]I found the program but can no longer purchase it and emails to the company/developer have gone unanswered.[/SIZE][/FONT] [SIZE=3][FONT=Calibri]I’m hoping folks on this site can help walk me through this process of how to determine exact POI/MOA figures for each hatch mark in the reticle for my load at any given power setting.[/FONT][/SIZE] [FONT=Calibri][SIZE=3]Any and all help would be greatly appreciated!![/SIZE][SIZE=3] [/SIZE][SIZE=3]Thank you.[/SIZE][/FONT] [/QUOTE]
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Calculating POI for Leupold Boone and Crockett Reticle
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