I plan on using it to hunt deer and for fun shooting. I wouldn't take a pistol shot on a deer from over 30 yards without a modern weapon and at least a red dot. I could probably make a longer shot, but won't do it unless my target is shooting back. Where I do most of my hunting, a 50 yard shot is pretty long.
I clicked those links you posted, they were helpful. The LeMat was invented in my hometown, but I don't think it's for me. Cool nonetheless.