It all boils down to how and where you hunt IMO. I don't care for the lightweights one bit but I do know people that have used them successfully. If the 22 rimfire were legal to use for deer I'm sure there would be a certain segment of people that claimed they were awesome one shot deer killers too. A dead deer is a dead deer. That being said, I will always err on the side of caution and use plenty of gun and bullet for the job at hand. Never had one too dead but I have seen a few too alive.