Clif, Shooting 28 gram 20ga. ammo becomes tiresome & even painful rather quickly in a hot corner with anything weighing much under 7 pounds. That has been my experience, YMMV. OTOH, I can shoot the 25gram & 7/8oz. loads all day, several days running in 20 doubles weighing 6#'s w/chequered butts &/or no recoil pads and never the first hint of fatigue or a bruise.
Bagged a number of both wild & fly pen raised pheasant over dogs the last three years using 28grams of lead #5's in a 20ga., but it was using a 31 Remington backing up other hunters and for wild flushes while flanking. Shame on me! 7/8's oz. of 5's would have done just as well on many of those shots.
Agree w/Kensal. I don't see that you really have an issue w/gun being proved for 2&3/4" 7/8oz loads & expect that it was odered proved in that manner. The buyer may have even sent his own ammo over for maker to use in regulation & choke boring. Should you acquire the gun & subsequently speak w/maker that may be a question you'd wish to raise.
Kind regards, tw
