Bought my hammerli \(\.177/\.22\) air gun when it first came out in 2007. Came with an RWS 350 scope.
I have babied it, no known damage from dropping an such. I have used it a LOT over the 13 years on vermits and birds and targets. I know how to hold it lightly and let it vibrate the same way each time.

It Always shot well until last week. I had been shooting starlings out my kitchen widow for a week when suddenly the shots were hitting two inches left. I adjusted the scope, it would work for 20 shots, and again began shooting left, Repeated this process three times. Shots always wondered left out of adjustment.

Scope appears to be tight.

anyone have an idea of what is going on?