A NH 273 doe not have much in the way of adjusting the feeding system to correct windrow issues. You need to drive different in thin hay to get square bales. Some times it will need the windrow close to the chamber and way out at others. The tension adjustment will only make a little difference.
Also how the windrow is raked will make a big difference in the baling job. If the windrow is not uniform then the bale shape will change. I mean the windrow can look even but does it have an equal amount of hay in each side??? Some times you have a triangle shaped windrow and that makes the bale be crooked.
The cut side of a square bale is always going to be a little tighter. The reason being is that the other side has the hay folded. The cut side is just that cut. So it is fuller.
Try driving different on the windrow and check how you have your hay rake in the windrow.
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