Boy if it is a 1972 model you have a good one on your hands. The model year in question were pretty well custom built by Ruger and are a step up from current production. They came with Douglas Barrels right from the factory. I sold my 280 Ruger number otherwise I would check it and report back. I had a 6mm Remington and never had a problem like your describing. I would give Ruger Customer SErvice a call and tell them about it and if possible return the gun to them if they think something is wrong. They will make it right.