Range set up - AMR vs LOS

[sam4886]

I'm going to move my range from where it is now to another spot and it got me thinking about how I should be measuring distances. The whole thing has a pretty gradual downhill slope, but there could potentially be some steeper stuff too. Nothing too crazy, maybe 10-20 degree slopes.

When setting out targets, should I be using the AMR or LOS setting on my kilo? Would it even matter?

1200 yards plus will be on the opposite canyon wall and about level.

 

[FisherT&C]

I think having a range to work angles is awesome. If other people are shooting there I would do actual straight line distance and tell them angles must be considered. Knowing the actual range and then compensating for the effect of angles would be an invaluable training opportunity.

 

[Jack Master]

I'd be apt to set the range up with True Horizontal distance (AMR?) rather than Line of Sight (LOS). This will make data gathering more efficient and easier. Sure, you can validate data and any range but having round numbers to work with is nice. Either way you'll be using both numbers. AMK is used for drop and LOS is used for wind.

 

[sam4886]

I'm under the impression that neither AMR or LOS are the true horizontal range unless you're ranging at 0 degrees.

We got it all set up over the weekend. KYL at 500 yards, then every 100 out to a mile. Turns out that the angles are only about 2-4 degrees so I don't think it matters a ton anyway. The steep angle stuff is over a little ridge and you can't really get any shots.

Dope via strelok was right on without accounting for angle.

 

[Jack Master]

I'm under the impression that neither AMR or LOS are the true horizontal range unless you're ranging at 0 degrees.

We got it all set up over the weekend. KYL at 500 yards, then every 100 out to a mile. Turns out that the angles are only about 2-4 degrees so I don't think it matters a ton anyway. The steep angle stuff is over a little ridge and you can't really get any shots.

Dope via strelok was right on without accounting for angle.

This is now a moot point but, yes, AMR in a Sig Saur range finder is the true Horizontal distance readings. AMR stands for "Angle Modified Range"
Here is a portion of thier user manual that defines LOS and AMR
Its good to know your equipment.

 

[sam4886]

The manual for my kilo 3000 also states that at longer ranges, I believe they say 800+, the AMR isn't as accurate and its better to use LOS and angle in a ballistic calculator.

But yeah, moot point. I'll have to try it on both settings out there and see what the differences end up being.