Thanks all. I went ahead and purchased some RST shells, their 2 3/4 Lite 1 oz loads. That should work for my hunting ammo needs. Im sure I could also use them for target shooting but would also welcome recommendations on off the shelf target ammo that has low pressures. I read over Drews linked article and it seems that Winchester AA low noise low recoil or B&P Competition shells could do the trick. If there are folks who currently use certain modern factory ammo brands that arent prohibitively expensive for breaking clays with vintage guns, please chime in.

I dont currently reload but I am starting to wonder if learning how to do so would be a good idea...