Mike those boxes are worth more than $4ea
I have some of the old Peters in 28ga and some of the Remington Express in 16ga. I don't shoot them out of the Parkers simply because I like the 2 /2 inch low pressure loads better, there easy on the gun and kill game just as well.
When you could still use lead shot for waterfowl out of anything smaller than a 12ga I used the Rem Express #5's out of a Browning Seeet 16. I wish you could find #5 shot and that I had that 16 back.