We can only score 300 by "limping", and we did it against the same opposition in the last ODI that we played on this venue. Yes, playing a dead rubber is not the same as playing a semifinal, but a total of 300 can be achieved.
trust me, bilateral game and ICC knock out game are completely different. Moreover condition is different between then and now. now you are playing on an used wicket which would grip a bit. even the game against SL, par score was about 260 or 270. now you are playing on a same wicket, it should be about 250 or 260 max.