angle cosine or angle degree

[mattj]

Originally Posted by trueblue

Part of my question also should have been which is going to be more accurate, cosine or degrees ?

Really the same -- at least with the Sniper Tools version, both versions are numbered in about 5-degree increments (cosine in cosine values though, obviously) -- so having a cosine out to more decimal places isn't going to be any more accurate. Calculating the cosine from degrees gives a more "precise" number in terms of having lots of numbers after the decimal point, but it's not any more "accurate" due to the measuring limitations of the device.

Not to worry though, it's still has plenty of "resolution" for our needs. If you started to try to be accurate down to the degree or sub-degree, you'd have start worrying about things like where your reticle is dialed when you site the target to take the angle. Fortunately, in the 1000 yard neighborhood, we're only talking an inch or two of difference per five degrees for the cartridges most of us are shooting -- so being super precise with the measurement isn't all that vital.

Anyway, it really does just come down to which is more convenient for you personally to work with.

[Mikecr]

I only use degress.
You can use an extra scope ring to mount the ACI to your scope. Just find one that clears the top of the action.

[eshell]

I prefer the cosine model myself, which saves a math step (or two brain cells, LOL) in the field, where my ACI is actually utilized. As posted above, one can always treat the cosine increments as 5o angle increments if needed and still be close enough.

For about $16, USTactical markets a scope ring mount that eliminates the need for an M-1913/Picatinny rail to use with Badger's versions of the mount bracket:
ACI Scope Tube Mount


ETA: Meant to mention that "W" (Ward Brien of SniperTools) is allowing a group buy discount on his MilSpec ACIs over at Sniper's Hide until 6-30-08:
Angle cosine indicator - Sniper's Hide Forums

[jmden]

Best price I've seen so far with Pic mount is:

Badger Ordnance/Snipertools Angle Cosign Indicator w/Gen 2 Mount [306-73A] - $149.95 : Long Range Supply!, Precision optics & more

Nightforce Angle Degree Indicator with Mount - ADIMT [NFADIMT] - $149.95 : Long Range Supply!, Precision optics & more

Anybody seen a better price?

[eshell]

Very good prices for the setups, jmden. I like the NF mount, due to not requiring removal of the scope from the rail to install.