With cattle going through the ring, and the average weight of them posted, the buyers can pay accordingly to how they think they will shrink which makes it totally fair. I fail to see where it is not fair to both parties. If they are fleshy and would normally have more shrink, buyers will nearly always pay less per pound to accommodate any excess shrink over leaner/harder cattle. That is up to the buyers at the sale to determine what is a fair price in their eyes and what their clients are looking for.
To each his own. I just have never had anyone represent a weight like you wrote it so I was naturally interested in your answer. That's the way you do it up there....