7STW…really bad choice. No brass, no data with new powders, no dies, no factory ammo, AND a 3.6” mag box isn’t long enough for new bullets.
28 Nosler…brass hard to find and expensive when you do, plus you will need to “adjust” the action’s rails, follower etc with no guarantees that it will work as well as it does currently. No availability of any factory ammo.
7 PRC…unknown future, no brass, less powder capacity than what you currently have. Can’t rechamber current barrel. I realize you aren’t considering that one but it was mentioned.
7 RM…popular, widely available, needs to have the throat extended nothing more. BINGO! Just stock up on components and wear out the barrel.
7 Mashburn...the old 24HCF darling. Huge supply of 300 Win Mag brass and easy to resize from what I understand.
