I would say the fact you crossed paths with a couple grouse, when grouse hunting, you were in the right area.
I don't hunt grouse, but I am in the woods a fair bit. Only real difference is altitude. Lower altitude = Ruffed Grouse. Higher = Blue Grouse. I just witnessed my first Blue Grouse, while traveling many miles on a dirt road, to a mountain lake for fishing, this was a couple weeks back. Absolutely huge, and dark colored when compared to a medium brown colored Ruffed.
I would concur with Roper. Bring a open choke shotgun. Or, hope the bird lands in a tree when using that 22., but loose the scope. Shots are generally close. Most often, grouse flush from the ground and land on a branch in a tree pretty close by. If no trees, that grouse will keep flying until feeling safe to land.
Biggest problem with using that 22. is shooting in the air at a bird in a tree. DO NOT ATTEMPT TO SHOOT A FLYING BIRD WITH ANY RIFLE! That is irresponsible. A bullet will travel over a mile. Shotgun pellets travel 200 yards depending on angle of shot. Thing is, shooting a bird in the body when using a rifle does series meat damage. What your hoping for is a head shot, especially when not using a shotgun.
Be safe! Have fun.