I have finally got round to installing a huma reg in my 25 Streamline set to 140bar. I have set up the Rifle to shoot the jsb kings at 910ftps which gives me around 800ftps with the jsb heavies which are good in the wind. The heavies are not as accurate as the Kings in my smooth twist and beginning to think it may be worth dialing back the rifle to shoot the Kings at 880ftps as I feel I am wasting air at 910ftps(rabbits don't notice the difference) and only getting 37 shots, dropping it down should hopefully get me to 40 shots. Before I start fiddling again, what are your views on the best speed for jsb kings out of a smooth twist barrel?