[OKSooner]

Hell, he's probably shooting prone off a rest from the back of that cargo truck. I can tell you that shooting something the size of a person at 100m is not difficult, at least when you're shooting at paper. The mechanics of the shot wouldn't be problematic.

Stable shooting position, and low profile. Probably has some kind of tarp or something lowered down to all but the lowest foot or two of the door to keep him concealed even when he's opened the door to shoot.

BTW, how difficult is it for the forensics lab to determine if an empty cartridge was fired from a self-loading gun or a bolt gun? Gas marks, extractor marks, chamber dimensions, etc? For example, I recall that certain HK rifles have fluted chambers and leave longitudinal lines on the cartridge. Do other types of rifles leave telltale signs of that kind?

[BCR #226]

All firearms leave tell tale signs. Look at primer indents and you can learn to tell the difference with some practice. A Remington leaves a different primer indentation than an AR or a Savage or Winchester.

Mike

[Dead Dog]

Think of the baffling you could build for cheep and set up in a delivery van. That with acoustic material on the walls, I would guess that leaves only the crack of the bullet and some muzzle noise in the direction of the shot.

[El Gato]

BTW, how difficult is it for the forensics lab to determine if an empty cartridge was fired from a self-loading gun or a bolt gun?

Not difficult, if you have fired case, but apparently they don't. Which leans in the direction of a bolt or break action type gun, but not very far, since if firing from inside a vehicle, the brass would likely stay inside also.

And yes, my H&K (7.62) leaves flute marks, although they are just powder/gas residue, and otherwise beats up the brass pretty badly.