Lefty rifles are not so much of"a special order" as they once were. Many larger gun shops will have some on the shelf in the more popular calibers.
The comment that"the 270 is more accurate" can easily be disputed since there are all sorts of 308 trarget rifles and damned few 270 target rifles.
I'm just not a 270 fan. If I'm going to shoot a long action and get get kicked that much, I'll just shoot the Daddy(30/06) instead of the skinny offspring.
I have more rifles in 30/06 than any other caliber but if I'm going to a smaller bore, I skip the 270 and go to the 25/06.