Rifle Scopes 1 mil dot at 300 yards

[lrgrendel]

Hi Guys

I have a 2nd focal plane 6 - 24 x 50 scope. At the max zoom of 24 what does 1 mil dot represent in inches with reference to the target at 300 yards?
And how do you calculate it?
Thanks

 

[shootist~]

Re: 1 mil dot at 300 yards

Assuming everything is correct at max power, it's .3 Yards: .3 x 36" = 10.8".

 

[Niles Coyote]

Re: 1 mil dot at 300 yards

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Liverpool</div><div class="ubbcode-body"> what does 1 mil dot represent in inches with reference to the target at 300 yards?
</div></div>

1 mil at 100 = 3.6" x 3 for 300= 10.8"

 

[fdkay]

Re: 1 mil dot at 300 yards

The mil-dot is about .25 of a mil, depending on manufacture. This would translate to about 2.7. Some mil-dots are .2 of a mil.

Are you asking what 1 mil sub-tends or are you asking what a mil-dot sub-tends. If I read your question literally, which of course, is the only way to read it, you are asking for the sub-tension of a mil-dot.

 

[bigjohn451]

Re: 1 mil dot at 300 yards

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Niles Coyote</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Liverpool</div><div class="ubbcode-body"> what does 1 mil dot represent in inches with reference to the target at 300 yards?
</div></div>

1 mil at 100 = 3.6" x 3 for 300= 10.8"</div></div>

Keep in mind this assumes your Scope reads true at Max power. Most lower end scopes do not read the reticule on the highest power. If your scope is calibrated at 10X. It will not use same numbers at 24X.

 

[427Cobra]

Re: 1 mil dot at 300 yards

1 mil at any distance is 1 mil

 

[WRM]

Re: 1 mil dot at 300 yards

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 427Cobra</div><div class="ubbcode-body">1 mil at any distance is 1 mil </div></div>

Quite true

Reminds me of a joke about a baloon and Microsoft CS....

Basics: Mil is short for Milliradian, or one one-thousandth of a Radian. 100 yards = 300 feet = 3600 inches, so at 100 yards, one Mil = 1/1000 X 3600 = 3.6 inches. 300 yards would be three times that amount, or 10.8 inches, as noted above.

Also, as pointed out above, a SFP scope can only be "true" reticle at one power setting. This is usually, but not always, the highest power setting. One way of checking this would be to place two marks 3.6" apart on a target at 100 yards, and see what power the marks line up with the MIL dots. If not at highest power, put a mark on the adjustment ring at the proper power setting.

Good luck,

Bill

 

[FrozenRopes]

Re: 1 mil dot at 300 yards

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: fdkay</div><div class="ubbcode-body">The mil-dot is about .25 of a mil, depending on manufacture. This would translate to about 2.7. Some mil-dots are .2 of a mil.

Are you asking what 1 mil sub-tends or are you asking what a mil-dot sub-tends. If I read your question literally, which of course, is the only way to read it, you are asking for the sub-tension of a mil-dot. </div></div>

Good point.
Are you asking the distance between the dots (center to center, which is one mil) which is 10.8 inches at 300 yards

Or are you asking how much do an actual dot from a mil dot cover, in which case it would cover a circle 2.7 inches in diameter at 300 yards.

 

[lrgrendel]

Re: 1 mil dot at 300 yards

Thanks guys.
You hit the nail on the head. It is a lower end scope as I said and I need to find out at what power the reticle is true. The scope is only temorary and came off a 17HMR. It is a Barska AO 10050. I will call them tomorrow to try and find out.

 

[coulthard_west]

Re: 1 mil dot at 300 yards

the best thing to do is to put a yard stick out to 300 yards and see what your retical says.

 

[sscoyote]

Re: 1 mil dot at 300 yards

That's the best way to do it, but if it mils correctly at 10x [3.6 inch per hundred yds. IPHY 'tween dot centers], then at 24 it's going to be VERY CLOSE TO 10/24x3.6=1.5 IPHY between dots, or 4.5IPHY @ 300 yds.--1.5x3 [i.e., SFP subtensions are ~inversely proportional to magnification]. The dot diameter will maintain the same relative measurement at .2 of 1.5 IPHY.

Here's a youtube link in which i describe [as best i can] how that system works--

http://www.youtube.com/watch?v=ozEhoNaRi2s
go to 4:45 to skip the 1st part of the video.

 

[lrgrendel]

Re: 1 mil dot at 300 yards

Thanks Steve great video and explanation.

I checked with Barska and yes the 10X is where the reticle is true.

If 32X happened to be the max zoom could I use your formula and is the following correct?
10/32 x 3.6 = 1.125" for 100yds
1.125 x 3 = 3.375" for 300yds