well its kind-of sorted..
just put 102 pellets through it. obviously im out of practice after 3 weeks of no shooting.. and it was windy.. but excuses aside...
i cleaned the barrel PROPERLY THIS TIME lol before i set off, grabbed my combro, targets and a fresh brand new tin of jsb's 4.52
so after 102 pellets im not right impressed to be honest. obviously the new grease etc will need to settle and the barrel will need re leading (after 102 pellets it should be tho?) , but it was allover the place still.. and the chrono results were even worswe than before with loads coming out aat 5f