I doubt very much that the bushel weight of wheat makes a difference. The weight of the grain doesn’t mean it is better quality. For example, feed wheat may weigh 85 bushel weight and milling wheat 75. Milling wheat is more valuable, approx £20-£30 per ton.
Barley is normally around 60-65 bushel
Mibbee it was protein %?
Was years ago and can just mind him going on about this fancy 'imported' wheat and spouting bushel weights and %s making his birds fly better.
Like I said not entirely sure it worked but can see the logic.
I can mind it was a bad year for wheat locally and it did look better quality bigger stuff.
I mind my 1st head keeper always said which has always stuck with me was never scrimp on the quality of food, if u have neighbours feeding better quality ur birds might not come back.
But I do know off shoots with no neighbours who do well feeding only barely