I am still useing a busnell 2.5-10, forgot the model but it would not have been costly when new in 1976. I have watched brand new higher dollar scopes go bad for no real reason soon after bought. Stuff happens. Use your scope. I also trust a scope , any scope till it fails. My other rifle scope is a first year made simmons atec scope on a 7mm rm and its still very good for some very impressive shooting at long distance 18 years later. I have been waiting for 15 years for it to give up to mount a 15 year old brand new burris block diamond scope that sits on a shelf in my safe. But its still first class.
Use your scope