I don’t know where they’d wind up on the chart for shot hardness but I’ve had much better luck with the Academy house brand Monarch pheasant loads than the Herters. They look like they took the old higher the brass the more powerful the shell thing to the extreme, bras comes nearly halfway up a 2 3/4 12ga. But they’ve functioned well in all my guns and killed pheasants really well on a couple trips to SD.
Who knows if they’re in stock or if you have an Academy nearby. Just a heads up in case you run across some.
