It's also about which way the field is facing in comparison to where the wind naturally blows, our field is a good 330' down the line and I've hit balls that far but our field almost always has wind coming in from right field so as a lefty batter it's not a hitter's park for me and it's a pitcher's park to a flamethrower because not many batters in our league are lefties so oppo shots don't go anywhere.
There's a field we play on a lot that looks like a hitter's park because it's 305' down the lines and 310' to center but the ball doesn't carry, the wind always blows in and never out.