Here's a relatively low powered .177cal Weihrauch HW100 (12ft./lbs) shooting at a distance of 200meters (approx. 650feet)...
YouTube- Weihrauch HW 100 177 S 12ftlbs 200m air rifle shoot episode 4
Excellent AG though at about $1300Can. Low powered Canadian spec. versions are available here in case you didn't want to get your PAL right now.
Sorry to hijack this thread BTW.