Got me curious so I went to http://www.handloads.org/calc/index.html to re-check something. Figure a .22LR is 36 grains @ 1280 fps or so - that's 131 ft/lbs of muzzle energy. I looked up what my camp-9 puts out, and it pushes federal 9bple 115 grainers at 1615.8 fps on average. It's still slightly more powerful at 550 yards (not the 500 I was guessing) than the .22 rifle is at the muzzle. Put another way, a .22 rifle even shooting mini-mags is still less powerful at the muzzle than the 9mm is from more than a quarter mile away. Even staying away from any +P+ or even +P loads; just plain old WWB-USA 115 fmj from the carbine runs 1505fps at the muzzle of the camp-9, and still has a little over 125 ft/lbs at 400-450 yards. Again, just a simple 9mm round; not approaching what a real rifle caliber can do. Ran numbers at 100 yards for the .22, and it's roughly 1010 fps, or 80-90 ft/lbs depending on bullet weight. That's what a 9mm carbine has at (believe it or not) 800-900 yards. From a strictly power perspective, if I can't see the 9mm carbine as "powerful enough" at 500-800 yards, the same has to be said of the .22 rimfire at 100-150 yards.