Tactical Military Arms

The Leatherwood ART M1000 Automatic Ranging and Trajectory Scope, Part 2

The 100-yard (simulated 250-yard) sight-in of the Leatherwood M1000 ART Scope. Rifle is the Armalite AR-10 NM.

The 100-yard (simulated 250-yard) sight-in of the Leatherwood M1000 ART Scope. Rifle is the Armalite AR-10 NM.

Editor’s Note: In Part I of this series we looked at the history and concept of the Leatherwood Hi-Lux M1000 ART Scope. In Part II, we’ll discuss setting up and sighting in this unique optic. And in Part III we’ll head out to the big range to see how well it ranges and compensates for shots out to 600 yards.

Setting Up the ART M1000

To test out the Leatherwood ART (Automatic Ranging and Trajectory) M1000 scope, I mounted it on the very excellent Armalite AR-10 NM (National Match) rifle. The ammo was Hornady TAP in .308 Win. (168 gr.). That’s all best quality stuff, so there’s no reason this rig shouldn’t shoot — and shoot well.

Calibrating the cam on the ART M1000 scope to your chosen caliber and load is easy. Simply look up your cartridge in the instructions to determine the code, then loosen and align the calibration ring with the power ring. In my case, I needed a code of 420 for the .308 168 gr. load.

Calibrating the cam on the ART M1000 scope to your chosen caliber and load is easy. Simply look up your cartridge in the instructions to determine the code, then loosen and align the calibration ring with the power ring. In my case, I needed a code of 420 for the .308 168 gr. load.

To mount the scope on the gun, the ART M1000 has two large knurled thumbscrews used to tighten the base — which is actually integrated as one-piece with the scope — onto the Picatinny rail of the rifle.

What I liked about this: It was fast and didn’t require any tools. What I didn’t like: After the first dozen or so shots you need to check and slightly retighten as the fasteners and lock washers settle in. However, the scope does ship with split washers and butterfly wingnuts for a more secure mount.

Having done this, next step is to calibrate the cam to your chosen caliber and load. A table in the instructions makes it easy to find the correct load and indicates the corresponding code.  For the 168 gr. .308 it was #420.

In the accompanying photo you can see how the calibration ring is loosened and rotated to line up with the arrow on the power ring. Simply re-tighten and you’re calibrated.

Later on, when we shoot at distance, we’ll have the option to tweak this cam setting based on an actual flight performance of our load/gun in our environmental conditions. Next Page

Visit GunDigestStore.com to buy the Leatherwood ART M1000, now on sale.

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