Free: Contests & Raffles.
Pretty hard to beat a good ole 22lr! Pops their heads right off!But then if your Ruff'en logging roads, 7.5's will do!Good luck and have fun!!
It's not just the shot size that you need to consider, but the choke, the amount of shot, the size of the birds, and the distance of your shots. You said "logging road" grouse, so for that I generally expect long shots. I'd go with a modified choke and some 1 ounce loads of 7-1/2's for ruffed grouse or Blues if they're really close, and I'd go with 6's or even 5's for longer shots, and those should be 1 1/8 or even 1 1/4 ounce loads. I always keep some light loads in one pocket and heavier loads in another so I can grab whichever I need for any particular situation.
Old paper with all the number wore off, various head stamps.