I recently found a used stainless steel frame for sale. The price was right so I bought it. When I got it home I began to check it over more closely, and found that the internal hammer block won’t allow the hammer to contact the firing pin. This happens about half the time when I pull the trigger. (Worked fine when I checked out the frame at the store) Is there some type of simple adjustment that I can make or would it be best to send the frame back to T/C?