Owen,

I use the RST 2 1/2" Lite load in 5, 6. and 7. This is their 1 oz load at 1175 fps. I hunt over a setter on wild pheasant in KS. The 5s are used towards the end of the season. The 7s are used in the first barrel because I run into quail now and then. My guns are nitro-proofed. As Larry said, call and ask RST on the pressures.

Ken