I have to share my grouse hunting experience with my 17HMR this last week...
I have for appr 40 years now shot grouse while out hunting big game with a 22 S/L/LR/quite shells and have shot hundreds & hundreds of grouse.
This last week my 3 1/2 year old son and I headed out for a deer hunt we were gone for 6 days and only came back because the weather was raining more than not so it was not much fun for him.
After only shooting 4 grouse we had a problem with the 22 rifle I had set up for him, it was crazy after 15 years of owning the rifle the hammer spring broke so we were forced to park the rifle.
Several years ago I had bought a Marlin s/s fluted 917 in 17HMR to shoot gophers with while in Alberta and had not pulled it out of the safe since last summer for some reason I felt guilty for not shooting it so I had thrown it into the truck on this trip so dug it out and strapped it to the quad.
This rifle is amazingly accurate I have even shot gophers out to 200 yards with it but I was totally concerned that I would blow grouse up if I shot them with this high velocity rimfire.
WOW was I ever wrong... out of 16 ruff/blue grouse I shot with it I only damaged the top edge of one breast and I was shooting them out past 50 yards (aimed for the neck/head).
I will definitely be using this gun/cartridge combo for grouse again and if my buddies are along I won't tell them what I'm shooting...

I have for appr 40 years now shot grouse while out hunting big game with a 22 S/L/LR/quite shells and have shot hundreds & hundreds of grouse.
This last week my 3 1/2 year old son and I headed out for a deer hunt we were gone for 6 days and only came back because the weather was raining more than not so it was not much fun for him.
After only shooting 4 grouse we had a problem with the 22 rifle I had set up for him, it was crazy after 15 years of owning the rifle the hammer spring broke so we were forced to park the rifle.
Several years ago I had bought a Marlin s/s fluted 917 in 17HMR to shoot gophers with while in Alberta and had not pulled it out of the safe since last summer for some reason I felt guilty for not shooting it so I had thrown it into the truck on this trip so dug it out and strapped it to the quad.
This rifle is amazingly accurate I have even shot gophers out to 200 yards with it but I was totally concerned that I would blow grouse up if I shot them with this high velocity rimfire.
WOW was I ever wrong... out of 16 ruff/blue grouse I shot with it I only damaged the top edge of one breast and I was shooting them out past 50 yards (aimed for the neck/head).
I will definitely be using this gun/cartridge combo for grouse again and if my buddies are along I won't tell them what I'm shooting...