Rifle Scopes Mildot specifications at different magnifications

[bourdlay]

Is thier any formula's that will work for changing mildot calculations at different magnifications? Lets say my APT is accurate at 10x being 3.6"@100yds. At 5x would 1.8"@100 yards be accurate. And if so how would you convert that to 14x and other magnifications?

Thanks is advance
Bourdlay

 

[benjaminzero]

Re: Mildot specifications at different magnifications

First: Go to OPTICS: FAQ. Many of your questions will be answered and offer formulas for ranging using the mil-dot system.

Second: Reticle is accurate at the highest power of your scope (in your example 10X)If you halve the magnification (5X) you have to double your mil reading to be accurate. IMHO if you go further than that things are getting too complicated. Also this assumes your power ring is in perfect synch with the actual magnification... this also needs to be tested. For best accuracy do your milling at the highest magnification if possible.

Third: Read up on first focal plane scopes. Then you don't have to worry about any of this.

 

[gugubica]

Re: Mildot specifications at different magnifications

Simple math. Remember, as the power decreases, the target size decreases relative to the reticle size, so it will take MORE target to cover a mil, not less.

If 1 mil = 3.6" at 100 yards on 10x, then:

10 divided by magnifiaction = conversion

3.6" times conversion = subtention at new mag.

i.e. 10/5 = 2
2x3.6" = 7.2"

or

10/14 = 0.714285714286
0.714285714286 x 3.6" = 2.57142857143"

So, 1 mil is going to cover 7.2" at 5x or 2.57" at 14x...

Or, you could get a FFP and 1 mil = 1 mil = 3.6 inches at any power.

 

[bourdlay]

Re: Mildot specifications at different magnifications

First: Very helpful

Second: Here that, I think I hurt myself

Third: I haven't used a first focal plane scope,so I can't judge, but it seems the reticle would be to large at long distances with the higher magnifications for a percise shot placement? How do guys get those shots in their with so much crosshair in the view? It has to be covering a lot of the target?

 

[orkan]

Re: Mildot specifications at different magnifications

Then you run into scopes that the power doesn't match the power ring markings, and even if they do, they might not be calibrated anyway. After struggling with that for a while, about a year ago I decided to switch all my scopes over to ffp mil/mil. The only struggle now is getting enough money to buy more of them, as the nice ones aren't cheap! Looking to the vortex PST line to remedy some of that problem though.

 

[orkan]

Re: Mildot specifications at different magnifications

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bourdlay</div><div class="ubbcode-body">Third: I haven't used a first focal plane scope,so I can't judge, but it seems the reticle would be to large at long distances with the higher magnifications for a percise shot placement? How do guys get those shots in their with so much crosshair in the view? It has to be covering a lot of the target? </div></div>

Its not as bad as you'd think. Here is a few pics that show a vortex razor at different power settings, looking at a house thats a mile out. Still precise enough to plainly put it on a target of your choosing.
http://www.gregd.net/pics/guns/optics/razor/IMG_3266.JPG
http://www.gregd.net/pics/guns/optics/razor/IMG_3267.JPG
http://www.gregd.net/pics/guns/optics/razor/IMG_3268.JPG
http://www.gregd.net/pics/guns/optics/razor/IMG_3272.JPG

The reticle selection is pretty vast from all the different companies that offer FFP. The P4F from S&B is one of the finest. Some would say, too fine.

 

[benjaminzero]

Re: Mildot specifications at different magnifications

In a FFP Scope... the reticle covers up the same amount of the target at all powers. That is why the Mil-dots are accurate at all magnifications.

GO to OPTICS: FAQ. This is all explained there...

Not trying to be rude... welcome to the hide. But there are many here who are less forgiving of posts that are covered in the FAQ or repeated weekly.

Better yet: http://www.google.com/cse/home?cx=010955838166721108978:qcbx5qqy10o&hl=en

 

[bourdlay]

Re: Mildot specifications at different magnifications

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: orkan</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bourdlay</div><div class="ubbcode-body">Third: I haven't used a first focal plane scope,so I can't judge, but it seems the reticle would be to large at long distances with the higher magnifications for a percise shot placement? How do guys get those shots in their with so much crosshair in the view? It has to be covering a lot of the target? </div></div>

Its not as bad as you'd think. Here is a few pics that show a vortex razor at different power settings, looking at a house thats a mile out. Still precise enough to plainly put it on a target of your choosing.
http://www.gregd.net/pics/guns/optics/razor/IMG_3266.JPG
http://www.gregd.net/pics/guns/optics/razor/IMG_3267.JPG
http://www.gregd.net/pics/guns/optics/razor/IMG_3268.JPG
http://www.gregd.net/pics/guns/optics/razor/IMG_3272.JPG

The reticle selection is pretty vast from all the different companies that offer FFP. The P4F from S&B is one of the finest. Some would say, too fine.

</div></div>

OK, much better example of what I have seen. The FFP scope that looked through had what seemed to be at the time heavy crosshairs, but anyway you've change my way of thinking.
I understand now no matter what, the reticle is the same size on the target through the range of magnification.

Very Helpful

 

[orkan]

Re: Mildot specifications at different magnifications

Now you got it.

As was mentioned, check out the faq. Me, well I have no problem telling people the same shit over and over again. Its rewarding to be helpful.

Don't be afraid to ask questions.

Use this search here:
Snipers Hide Search

Much faster and seems to do a better job than the one built in the site. If you can't find what you are looking for by searching, then ask away. Lost of knowledgeable people here.