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Angle cosine indicators

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Old 09-13-2012, 09:56 PM
Junior Member
Join Date: Sep 2012
Posts: 24
Angle cosine indicators

So I am looking around for a good Angle Cosine Indicator (ACI) with mount...and I come across the following set-up.


Looks like it'll cost me somewhere around $250.00, as I will need the bottom ring as well. (I am NOT using a Night Force Scope and rings).

I have been using the Vortex anti-cant device on my Remmy 700LTR. (.308). But if I am going to purchase the ACI, it will start getting too busy with all the added goodies on my scope - hence I am looking at the latter set-up.

Is this a good set-up...or can y'all recommend something similar...or cheaper?

Just curious, as I may take the plunge sometime in the near future.

Like mentioned earlier, I am using a Remmy 700LTR (.308 Win), and do not foresee shooting over 600-yards with it. My loads will be 185-grain Berger Hybrid Hunters.


In Christ: Raymond
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Old 09-15-2012, 08:25 AM
Silver Member
Join Date: Jan 2010
Posts: 284
Re: Angle cosine indicators

If you are interested and your scope is 30 mm ,,,i have a complete set up brand new ,,never mounted for sale ..$ 300.00 plus $6.00 shipping.
If you are interested send me a e-mail== prhmmm@yahoo.com

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Old 09-15-2012, 10:14 AM
Gold Member
Join Date: Aug 2008
Location: east central fl. /n.c. pa.
Posts: 634
Re: Angle cosine indicators

i would answer your question with a question. have these issues been a problem for you?
i mean can you relate to an incident where youve missed a shot because you
hadnt spent hundreds of dollars on these items?
im not saying they wont work. im saying their not necessary in order to be a
very successful hunter.
certainly cousine is important to compensate for. but there are numerous ways to do that without spending hundreds of dollars for a device mounted
to your scope.
any angel measuring device even homeade will do that. even cheap calculators have the cousine feature. ive recently been using a device called the slope doper which cost about $30. it has all the percentages worked out so that you can simply apply basic math in your head as you use it. its not much larger than a buisness card. im of the opinion the device your referring to works the same way.
probably the best all round system is a balistics program for the i phones.
you can simply hold the device on the barrel and the program will do the rest.
that would include all necessary data to be dialed into your scope including windage and elevation.
on the otherhand the more gadgets you can add to the gun the more questions your apt to be asked by those uninformed.
you need to ask yourself whats important to you before deciding.
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Old 09-15-2012, 10:29 AM
Silver Member
Join Date: Jun 2010
Posts: 464
Re: Angle cosine indicators

Defensiveedge.com has them for around $225 with bottom ring. Shawn carlock is easy to deal with also.
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Old 09-22-2012, 09:03 PM
Junior Member
Join Date: Sep 2012
Posts: 24
Re: Angle cosine indicators

Originally Posted by extreme View Post
If you are interested and your scope is 30 mm ,,,i have a complete set up brand new ,,never mounted for sale ..$ 300.00 plus $6.00 shipping.
If you are interested send me a e-mail== prhmmm@yahoo.com

@ Extreme: Funny. I wrote that I can get everything I need for $250.00...and then you offer me yours for $300.00. ;)

@ Yobuck: I am in California, and we have many hills and valleys. Like I mentioned, I will not be shooting over 600-yards...but I have had to take 2 or 3 extra shots sometimes. So, "Yea"...I do miss because of the angles.

I am aware that there are other goodies to help with the angles (cards, phone apps, MildotMaster, slope doper, laser rangefinders with ARC installed, protractors, etc), but it seems that a simple, solid device mounted onto the rifle would be the simplest.

What if your batteries go dead on your phone or rangefinder? What if you drop and damage your rangefinder? What if extreme weather throws-off your electronic device? What if it is not weather-proof...or fails to be weatherproof?

So many things can happen to your electronic devices. But if you have this set-up on your rifle - a pen and paper (or sand and a stick) can get you your corrected range to the target. Nothing "extra" to depend on.

And let me throw out another thought. The above set-up will cost me approximately $250.00. But for a few more shekels I can purchase a good rangefinder with an angle compensator.

So now the questions:

1) Dish out the $250.00 for the ACI with anti-cant device?
2) Purchase some other cheap tool?
3) Just get a dedicated laser rangefinder that has an angle compensator?

Thanks again for those who replied.

In Christ: Raymond

PS: I've had a Mildot Master for many years now. Sweet device, but I hate having to pull it out, and doing all the pinching and stuff. And even then, I'm still off a bit if I pinch the paperclip wrong.

Last edited by RaymondMillbrae; 09-22-2012 at 09:36 PM.
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Old 09-22-2012, 09:47 PM
dig dig is offline
Gold Member
Join Date: Sep 2010
Location: Arizona
Posts: 566
Re: Angle cosine indicators

The Horus Vision ACSLI is a great option at about 70 bucks. Lighter than others as well. I have and use several.
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Old 09-24-2012, 05:47 AM
Junior Member
Join Date: Sep 2012
Posts: 24
Re: Angle cosine indicators

@ Dig: How has the clear plastics held up?

Are they fading or failing to be crystal clear?

I have seen them before, and dig the fact that they have both the sine and degree scales. This will make it easy to compute angled distance in almost any format. But in all honesty, the totally clear plastic housing kinda turns me off.

Still looking around...and still have my ear to the ground for opinions/reviews.

In Christ: Raymond
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