Hello Rondog,
I am familiar with them. The M1000 is the most current, civilian model of the ART (Auto-Ranging and Trajectory) riflescope developed by Jim Leatherwood. Jim's first ART scopes were used by the U.S. Army Sniper program from Vietnam to the mid-1980's on the M21 (an accurized M14 with the ART mounted on it), and there are still some in service today in Iraq and Afghanistan. They are no longer the primary glass that is used by U.S. Army snipers today, but they are the only scope from their era that are still used. As a matter of fact, Larry Vickers from Vickers Tactical television show recently spoke about the fact that as a US Green Beret he used the ART scope when he was in service.
The M1000 is NOT the version of the ART used by the military (that is the ART II, now built in Oklahoma). However, the M1000 was invented by Jim Leatherwood just prior to his death in 2007, and still uses a CAM that elevates and lowers the scope to match the trajectory of your round as you frame 18" on the target. So, if you are shooting a deer, elk, steel target, etc., you will need practice framing 18" on your target, but the cam takes care of the rest. No hold-over required.
You simply set the cam to your round's setting, zero and then go shoot something. The unique feature about the scope is that you don't need to know the distance to your target for holdover purposes. As you frame, the cam does its thing, and then you are able to put your crosshairs dead on (windage and elevation not withstanding).
The M1000 is made by Leatherwood/Hi-LuxOptics. There are some videos on YouTube if you search Leatherwood Scopes or Leatherwood M1000.
Another scope released by Leatherwood earlier this year is the CMR. Some users have also made videos and placed them on YouTube as well. Just search for Leatherwood Scope or Leatherwood CMR.
The CMR is a 1-4x with an illuminated BDC reticle.
I've personally used both scopes and can confirm that both concepts work.
Hope this helps.
