275 would be a decent one, for that's the year the battle of Beneventum took place, in which Romans reportedly defeated Pyrrhus. If that battle would have gone the other way, Pyrrhus might not have lost his hold on Italy. The year 272 is a bit late to me, because that's precisely when the Epirote power collapsed, plus a few other inconveniences (Spartan king being in Crete, Pella belonging to Pyrrhus, etc.).
I agree with you completely. But that's nothing a few small tweaks can't fix, is it? A few sloshes in the descr.strat and you'll be nearly there! I may try that on my own game...