I believe you. It happened to me on a Air Wolf I once owned. One day it jammed-would not cock. I took block apart where the firing mech is housed to find 5 yep 5 crushed up pellets. It was one of the first Air Wolfs made. I rang Daystate, they said yes it is a problem we have seen before and we have a remedy-they sent me a pack of o rings, one to be fitted over the pin/probe that pushes the pellet through and back hard against the block. Never had any prob after that.
Don't ask me how they got in there, I still do not understand.
Kat.