GTA
Support Equipment For PCP/HPA/CO2 and springers ,rams => Scopes And Optics Gate => Topic started by: Earl on February 26, 2018, 03:50:18 PM
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I have a Kruger 3-9x32 AO scope with dots on the cross hairs.
6 dots on the cross hairs are .413 feet apart at 55 feet at full power=9x.
What factor should I multiply the ballistic table mils by to get the correct number of dots to use for hold over.
Is the factor 1.25?
Example: If the ballistic table shows 2.0 mils needed should I hold over 2.0 x 1.25 = 2.5 dots on this scope.
Or is the factor 0.80?
Example: If the ballistic table shows 2.0 mils needed should I hold over 2.0 x 0.80 = 1.6 dots on this scope.
My conclusion at 1:11 am on 2/27/2018 is that I need to multiply 0.8 times the number of mils needed to get the number of dots needed at full power=9x.
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I'm no help with the math, but...........You can set to 9x and place a center meter ruler out exactly 10 meters and the dots will line up with the center meter marks...if you have a true mil dot reticle for 9x. 1mil equals 1 centimeter @ 10 meters. Mil-dot reticles are set up for 10x on most second focal plain rifle scopes.
This test will only prove you have a true mil dot reticle for 9x. Converting moa's to mils is a pita. where it is so simple to convert mils to meters I can do in my head.
Someone else will have to explain the complicated math that goes along with moa turrets and mil dot reticles, most likely you'll need a calculator! I use matched mil turrets with mil reticle, makes things simple for me. ;) :)
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I'm no help with the math, but...........You can set to 9x and place a center meter ruler out exactly 10 meters and the dots will line up with the center meter marks...if you have a true mil dot reticle for 9x. 1mil equals 1 centimeter @ 10 meters. Mil-dot reticles are set up for 10x on most second focal plain rifle scopes.
This test will only prove you have a true mil dot reticle for 9x. Converting moa's to mils is a pita. where it is so simple to convert mils to meters I can do in my head.
Someone else will have to explain the complicated math that goes along with moa turrets and mil dot reticles, most likely you'll need a calculator! I use matched mil turrets with mil reticle, makes things simple for me. ;) :)
The dots are MORE than 1 centimeter apart at 10 meters at 9x when I checked.
The best that I can tell they are 1.225 centimeters apart at 10 meters.
8 dots look like 9.8 centimeters so 1 dot=9.8/8=1.225 centimeters
My conclusion at 1:11 am on 2/27/2018 is that I need to multiply 0.8 times the number of mils needed to get the number of dots needed at full power=9x.
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So, 1.225 cm X 6 (# of mil dots)= 7.35 centimeters
7.35 CM = 2.8937 inches
Doesn't seem right to me? ???
Are you sure they are true MIL Dots and not just markings on the scope? :'(
There HAS to be a program for all this..... :-[
-Y
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According to my measurements the dots on the Kruger 3-9x32 scope at 9x are 1.25 mils apart.
Therefore when your ballistic table says you need 2.0 mills hold over, you need to multiply by .8 to get 1.6 dots of hold over for this scope when at full power = 9x.
Variable power scope mil dots are usually 1 mil at 10x only.
At 9x, the mil dots would then be 10/9 = 1.1 mils apart
1 mil = 1/1000 or 0.001
1 mil = 1 meter at 1000 meters
1 mil = 1 yard at 1000 yards
1 mil = 1 foot at 1000 feet
1 mil = 1 inch at 1000 inches
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Don't know if you already have it or not and it's been awhile since I looked to see if it's still there, but Chairgun Pro used to have a generic mildot reticle option that might help you with calculating your holdover points a little easier.