As the title sayd I'm ordering my first barrel and I'm really worried I'm going to miss order something. Here is my goals. I have a old savage chambered in 220 swift and I want to put a 220 swift fast twist barrel on it. Hart currently has one of the better lead times so I'm going to give them a try.
My plan is to get the action trued and all the barrel work done by a gunsmith. Here's my question the chamber end of the barrel I want is 1.250 OD and my gunsmith asked me to have Hart "set the shank diameter" what does that mean?

My understanding the adavantage of having the action trued and having the barrel threaded by a gunsmith is better match up of the barrel to the action.

Is there a standard shank diameter that Hart will know and this is no big deal?

I just want to make sure the gunsmith has enough material to make the threads what ever he need to best match up with my action.

Thanks for any help.