Me and my friend like to travel small, because usually grouse is secondary hunting critter when we are in the woods, My friend has a 22 and is trying to find a round that would allow more impact on grouse to nock it for a loop when bullet hits.. he has been talking about finding rubber bullets, or some kind of flat hollow tip... any ideas out there to the 22 hunter for grouse?
Now I have a new bond arms pistol 410/45, I have killed 1, and wounded two out of like 6 attempts, I know I need to be as close as possible with my short 4 1/4 in barrel, but witch 410 round should I be using

??
thanks
Co