Thanks people, keep it coming. Yes ive tried it without the shroud, with and without a silencer, a good charge, reset settings, 3 different scopes and more pellet brands than I care to mention. And of course letting other people try it to eliminate user error. To me a "flier" is every now and again, not 5 or 6 in a row every so many shots :-( it might be a programming issue, im just clutching at straws though.
air arms MPR FT .177
wiehrauch HW97 KT .177