has anybody had trouble with the internal silencer thing in barrel making gun shoot allover the place grouping really badly,havnt had gun long and its a waste of time hunting with it,never had problems in the past had same gun in 177 it was fine,could i have a faulty barrel on my third scope bought a half decent bushnell to see if it was my aim,and my mate bore sighted it for me but still all over at 30m,using airarms field pointed pellets which was recomended in gunshop,could it be the pellets?always used magnums before any hep or advice