I agree in principle with 272 BCE as a terminus a quo (perhaps down a year from my 273 BCE). The terminus ad quem is the LXX translation, which I take as having taken place in 273-269 BCE, per arguments at Gmirkin 2006: 81-88. But if one took the LXX translation of the Pentateuch as having taken place later, then I agree this would most certainly affect the possible date range of composition.
I agree in principle with 272 BCE as a terminus a quo (perhaps down a year from my 273 BCE). The terminus ad quem is the LXX translation, which I take as having taken place in 273-269 BCE, per arguments at Gmirkin 2006: 81-88. But if one took the LXX translation of the Pentateuch as having taken place later, then I agree this would most certainly affect the possible date range of composition.