Hi Col and Rob, last shoot at Kingsley I was shooting one of them PCP thingy-majigs! Just about to start scrolling through that post on the BBS see what I can get out of it. I remember you mentioning rate of fire and think you may be on to something there. I think I will do a strip and see how tight the piston seal is in the compression tube, also will have a play with the front stock screws to see if removing them yields any results!?
Rob I havent had chance to chrono during the variation yet, but will report back when I know more.