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DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3572 Location: Utah
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Posted: Wed Feb 01, 2012 4:11 pm Post subject: Mill Dot Table |
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Due to frequent requests I added a Mill Dot Table to the program last night. I plan to release a new version in the next couple days.
I will be adding .5, .33 and .25 MOA click tables as well.
-DallanC
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Vince Site Admin
Joined: May 25, 2005 Posts: 15725 Location: Brisbane AUSTRALIA
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Elvis Super Member
Joined: Jul 27, 2008 Posts: 9261 Location: south island New Zealand
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Posted: Wed Feb 01, 2012 9:20 pm Post subject: Re: Mill Dot Table |
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man those click tables will be usefull!!!
I may even have to print them off to use.
_________________ You shot it You pluck it !
Them who eats the most duck eats the most feathers! |
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pete4d Super Member
Joined: Nov 27, 2011 Posts: 957 Location: Dixie , Alabama , & Louisiana
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Posted: Thu Feb 02, 2012 6:00 am Post subject: Re: Mill Dot Table |
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DallanC..... thanks that sounds great ,,,, got a mil-dot.
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DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3572 Location: Utah
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Posted: Thu Feb 02, 2012 11:14 am Post subject: Re: Mill Dot Table |
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Ok so the final tweaks on layout are done. The top of the MOA page has a dropdown for the "units" to calculate it in. 1 MOA, .5 MOA, .33333 MOA, .25 MOA and MIL-DOT.
I have a couple minor things to wrap up before I push up the new version.
-DallanC
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gelandangan Super Member
Joined: May 07, 2006 Posts: 6401 Location: Sydney Australia
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Posted: Thu Feb 02, 2012 2:25 pm Post subject: Re: Mill Dot Table |
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Thanks for your hard work!
_________________ A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.
Do - Not try!
gelandangan.weebly.com/ |
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mtnlvr Rookie Member
Joined: Feb 08, 2012 Posts: 5 Location: MN, USA
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Posted: Tue Feb 07, 2012 9:54 pm Post subject: Re: Mill Dot Table |
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I may be misunderstanding how to use the MOA table, so hopefully someone can clear something up for me.
If I set up a load sighted in for 100 yds and check out the Table Data, I should be able to take the Elevation from 500 yds, divide by 5, and divide by 1.047 to get MOA to come up. But if I go to the MOA table and align the 100 and 500, there's a different value than what I calculated.
Am I going about this the wrong way? What am I missing?
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DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3572 Location: Utah
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Posted: Wed Feb 08, 2012 3:29 pm Post subject: Re: Mill Dot Table |
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I recently made a change to these calculations, there is a chance I accidently introduced a bug of some form. Let me dig up the code and double check the calculations.
-DallanC
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mtnlvr Rookie Member
Joined: Feb 08, 2012 Posts: 5 Location: MN, USA
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Posted: Fri Feb 10, 2012 10:20 am Post subject: Re: Mill Dot Table |
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Did you get a chance to verify the calcs in the MOA table?
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DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3572 Location: Utah
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Posted: Fri Feb 10, 2012 11:49 pm Post subject: Re: Mill Dot Table |
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Verified, found the problem and fixed it. I will be pushing up another version Sunday. Thanks for the report!
-DallanC
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DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3572 Location: Utah
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Posted: Sun Feb 12, 2012 9:42 pm Post subject: Re: Mill Dot Table |
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Ok so wait, I did some more work on this and realized the initial calculations appeared correct after all.
For example I compute a trajectory from the following values:
BC: .349
Vel: 2750
Alt: 1500
Weight: 150
Dist: 100
Temp: 70
Sight: 0.0
Which gives me a zero at 100 yards, and a height of -68.45" at 500 yards.
-68.45" / 5 = -13.69"
-13.69" * 1.04719756 = -14.3361345964" MOA.
The MOA table shows a print out of -14.34 in the 500 yard column.
Another test:
BC: .445
Vel: 3100
Weight: 130
Alt: 3000
Dist: 100
Temp: 70
Sight: 1.5
This gives me a zero at 100 yards, and a height of -41.46" at 500 yards.
-41.46 / 5 = -8.292
-8.292 * 1.04719756 = -8.68336216752 MOA
The MOA table shows -8.68 MOA in the 500 yard column.
So after alot of testing, I'm not seeing where this is failing. Please post the values you are using to generate an error and I will dig into this further. I am not saying you arent seeing a problem, just that I cannot reproduce it in my tests.
-DallanC
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mtnlvr Rookie Member
Joined: Feb 08, 2012 Posts: 5 Location: MN, USA
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Posted: Mon Feb 13, 2012 8:23 am Post subject: Re: Mill Dot Table |
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Thanks for checking. I won't be home till later to see the example I was looking at, but if 1 MOA =1.047", then the inches should always be higher than the MOA right?
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mtnlvr Rookie Member
Joined: Feb 08, 2012 Posts: 5 Location: MN, USA
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Posted: Tue Feb 14, 2012 7:11 pm Post subject: Re: Mill Dot Table |
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First off, I want to say that this software rocks! I took my first shots at 1000 yds this weekend with impressive results. I had printed out a couple of PB table data (1 for 100yds and 1 for 300yds) and used that to calculate MOA to bring my zero from 100yds to 300yds, and another to bring it up to 1000yds.
Anyway, here's what I've got for my 270wsm.
BC: .495
Velocity: 3046
Weight: 140
Altitude: 1750
Zero: 100
Temp: 30
Sight: 1.63
In several ballistic calculators, this results in the following:
PB = 43.05" low @ 500 or 9.02 MOA
JBM = 42.8" drop @ 500 or 8.2 MOA
BGI = 42.6" drop @ 500 or 8.25 MOA
Hornady = 43.8" drop @ 500 or 8.4 MOA
Unless I'm misunderstanding the intent of the MOA table, it seems that the drop should be divided by 1.047 to get the MOA.
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DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3572 Location: Utah
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Posted: Sun Feb 19, 2012 8:47 pm Post subject: Re: Mill Dot Table |
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Updated, fixed. New version is posted with a couple other tweaks.
-DallanC
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