Quote Originally Posted by rancidtom View Post
You will probably find a slightly higher muzzle energy with a heavier pellet, the 601's are generally used with RWS R10 for 10m target shooting, try it with them you might see 5.8-6 FtLb. JSB Exact (if you aren't paper punching) are the same weight approximately, again they may well nudge 6 FtLb but the gun was never designed to exceed the German "F" class of sub 7.5 Joule so you really can't expect that much more than you are already getting!
I was expecting it to hover somewhere around the 6ft/lb mark, just wondered if it was a little too low at 5.25, re the R10 pellets many thanks for that info was completely unaware of that. Will have a look through my pellet stock and see what I have that is 8.2gr equivalent, I know I have meisterkugeln but they are only 7gr

Many thanks for the input