Got mine ordered this will be my 3rd "air gun" my second breakbarrel I don't see how I could expect anything less than perfect performance out of this its too simple I'm going to show you guys once it comes I don't have a good crony but the crony connect app. On my phone works well I'm going to upgrade the rear sight soon after it gets here to a better open sight and see if I can fab. Up some custom barrel washers or something fun. Happ shooting!
Sounds to me like the pellets may have been clipping the "cocking aid" did you check to see if the pellets were hitting it anywhere on the inside? Maybe when you were cocking it, it slipped off a little bit and caused you the problems.
Looks like it shoots pretty good. How's the overall quality of the build? How's the trigger? You didn't tell us near enough.