Battle:
According to RST their 16 ga 1 oz shells test out at 1145 fps and 6600 psi, and their 16 ga 7/8 oz shells tested at 1100 fps and 5700 psi. If you have any questions on the specs of their shells call them at 570-553-2845 and they will give the info on the phone.

Good Luck.......Chicago Mike

Another source for boxes of 2 1/2" shells would be Fieldsport in Traverse City, MI. They carry a fairly good supply of shells. Just google "Fieldsport" and they will pop up.