they are the same of the gear score, but they adapt based on the calculation of your gear score.
If you have done the raid and you have started it at level 150, beating the first boss and getting 2 pieces (lvl 260) that raise your level to 215 doesn't make your gear score 215 since the game calculate the average real value of your pieces. IF you want to craft 250 gear score pieces, you need to at least have almost all equipped items at level 250.
250 is the maximum actual gear score available. That's all. You cannot craft this higher that those, not until they will raise it. But they will never do it because they will remover the entire sistem from the game.
Anyway, at the moment it work exactly as the division
Blueprints serve no real purpose end game,
Honestly u can buy them but is really dumb to do so bc once past 245 they are always 1-2 levels lower than gear score.
It would be nice if u were 252 u craft at 252
Or 257 would craft at that and so on,
Yep probably won’t change but seems pointless
Especially to spent money on them
Glad I did not