The FCNC schedule gets set for about 4 or 5 yrs at a time, the club/range that will host it has to request that it be held at their facility. The current schedule 19, 20, 21, and I think 22, was agreed to about a yr or so ago.
Camp Perry - nobody has stepped up to run it, and if you have shot there (I have) do you really want the FCNC run there? I shot the F class matches that were held there in '12 and in '14. If it is run the samw way I don't. It is convenient to the shooters in the east, but it is the slowest match I've ever in which participated, and the format of the NRA National matches it totally different than the FCNC. The range facilities are certainly capable of handling the match. If there was an organization that wanted to run it there and put their hat in the ring for something past '22 it could happen, but who is going to step up and run it?
Atterbury - Camp Atterbury came in to prominence in sling shooting last yr when the NRA and the CMP got into a pissing match and decided to get a divorce and the NRA moved all the NRA National Matches from Camp Perry to Atterbury.
I understand that the IN ANG has stepped up and made some improvements at the range to support the NRA Nationals there. If the range has 100 firing points and can handle 400 participants (I have never shot there) and the club at Atterbury could certainly put Atterbury in the mix in the future, but when the current schedule was established it wasn't ready for it and was far as I know it was not proposed.
@johnnyi where would you park everyone, and how long would it take for 16 relays?