Quote Originally Posted by Minuteman View Post
I'll refer you to my earlier post if I can - http://www.airgunbbs.com/showthread....40#post6472340

160 mps equates to 4.8ish ftlbs.

I would suggest that to get anything like 17J out of that length of barrel in .177 with co2 is going to involve changing the laws of physics.
I'm not saying it's 17j, it's likely the polish site has made a cockup with that figure and was meant to be 7j possibly? Even still, 160m/s is a lot for .22 in a pistol format, hopefully that figure is based on using very light pellets

Edit: apologies, your 160m/s was referring to .177