Stuck pellets in a barrel

2 questions. If I have to drill out The pellets, drill the front or back of the pellet? It is a Diana 460. So, if i have to drill from the back how do I get the barrel off? Remember the spring and piston are in the way from the back.

Did you buy it new if so I would send it back if those pellets got stuck not by user error. Have them send a shipping label. Don't ruin your gun!
 
Yo has a good point. If you do not feel confident doing the work your self. I believe the Diana’s have a life time warranty. You could send it in for repair but you would have to pay for shipping and insurance both ways. About $ 80.00 to $100.00 . I would call Umarex and see what they have to say about any charges for repair. Everyone has different abilities and risks that they are willing to accept. MM