For the last year I've been convinced that 760 - 770 was the magic number for my TX with JSB Exacts, but now I'm not so sure. Last week I fit a new spring and seal to the TX. Shot 200 ish pellets through it till the power rise seemed to slow down/stop, then had a washer out. That left it on 740 fps (10.25 ft-lb). Decided to leave it there for a couple of weeks to see if the power would change any more. At the weekend I went out with my 'underpowered' TX and got my PB on Saturday (54) then matched it on Sunday. Had a bit of time at the range and accuracy is the best it's ever been. Could this purely be down to less power = less recoil and easier to shoot. Or is this die of Exacts possibly more stable at this lower than usual speed? Would be interested to see what pellet speed other people have found works best in their springers.