Hello and thanks everyone for your welcome comments, they are much appreciated. Thanks 18 wheeler for clearing that one up for me. I wasn't sure so I didn't wana do anything wrong. I did clean the barrel though yesterday using some fishing line and some clean bits of cloth attached to the end and the first few patches had thick black grime on them so I used new patches until there was no grime left.

Thanks for the tip about using a cigarette filter, I shall give it ago when I buy some pellets. Maybe some H&N FTT I know they're pricey but the tornado seems to like them.

Thanks again guys

Alex