I have a used barrel that had a tuner on it and the thread measures .902 and thread is 32 . Does anyone make a tuner with that thread . Or should I just take the barrel off and turn a new thread I really don't want to go a 5/8 size this is on a 1.250 diam barrel . And another question by turning the barrel down will that let the barrel expand to much and open up the bore as the bullet leaves the barrel .