Revolver 'tuning'

I have several questions that I was hoping to get help with. These all involve getting my carry revolver (a Taurus M445T) 'tuned'.

1) What is involved in having a revolver 'tuned'?
2) How much should it cost?
3) Do you know of anyone in the DFW area who is reliable and affordable?

I wasn't sure where to post this for best response, so I've put it here and under general handgun discussion.

Thanks