if you have changed the barrel a few times --look for the little oring that seals the barrel has it been disturbed -- I did not notice when I changed my barrel that the oring did not come out with the barrel so when I put the longer barrel in I got 2 o rings in and they had moved and blocked the loading of a pellet and had to use force to get them in --- have a look you never know
On the nose. Exactly the same with mine. Removed the extra "O" ring and its sweet as a nut.
You can spend thousands and still miss a barn door or spend just enough and enjoy yourself. If you haven't got the talent to start with a million pound won't fix it. Whippet, Russell, a few bang sticks and a flat cap. http://www.smart-tech1st.co.uk