Iv only cleaned the barrel with the cleaning pellets not a pull through it’s had a tin of rws superdome and nearly 2 tins of h&n ftt through plus tried falcons and air arms and bisley mag . I ll try cleaning it again and just use the falcons because I think they have been the best so far , is it worth trying more brands of pellets or have I about covered it at that ? Also would it pos shoot better at say 10 .5 instead of 11 . 6 or would that not make much difference?