I think the lowest power I ever tried for 100 yard shooting was something like 20ftlbs worth of 15 grain .22, whatever that works out at in terms of velocity. I can't remember the group sizes, but they must have been fairly unimpressive because I didn't bother again after a couple of sessions.

The Career was certainly capable of something like an inch at 100 yards when everything went OK, but that was using about 45ftlbs energy with a 21 grain Bis Mag. I actually used to write all the group sizes and wind conditions etc down in a little notebook, but god knows where it is now.

What gets my goat is when the claims go from paper to live quarry ( like Harry " I never missed a rabbit even at 100+ yards " Fuller ). I'm no bunnyhugger, but at the end of the day they are living creatures, not convenient reactive targets.