the open, in daylight. You don't have to go any particular place, in any given time frame. BIG diff. The survivalist can just WAIT, or do without, or go the long way around, find them next YEAR, etc. So you do NOT need a long range rifle. Nor should you be wasting ammo on what you can't see (ie, guys using cover) and behind which stuff will PROBABLY stop your 30's too. Engine blocks stop them 3 ft of loose dirt, a foot of sandbags stops them, concrete stops them, and even GLASS will deflect them,if the hit is not at a nice 90 degree angle, and the target is more than a few inches behind the glass, especially windshield glass. Also, glass will "move" the image of the target a bit, if it's not perfectly transparent(and it rarely is). The worse the impact angle, the more the image is out of line with where the target REALLY is. Being without the .22 unit, the GI rifle rd, the sound suppressor is FAR worse than being without more than 1/4mile of range, or the 2500 ft lbs of energy of the 308. Stealth and discretion are far more likely to save you than stupidly shooting at everyone, on sight, at any range, in any cover.