Your post just reflects why you should be able to set your gun to YOUR required parameters. To have a rifle that is fixed stops you setting your rig to your requirements. Not everyone wants to run at 11.99 FPE just as not everyone wants to run at 10.1 FPE. What you should be able to do is run at the power/speed that you are comfortable with.
You should also be able to set your rifle to the "conditions" on the day to ensure you don't fail the chrono.
AT stops that.