I purchased this 10/22 new for some shooting fun and squirrely hunttin". It has only had about 150 rounds through the weapon, cleaned and stored in gun safe. Removed it today to have some fun with my son at target shooting. Well, big problem. Bolt will not open. Removed magazine, pressed release pawl, nothing. There is no unfired rounds in the weapon. Anyone have any suggestions? It was thoroughly cleaned prior to storage.