Haven't killed a squirrel yet, but I want to spend a little more time trying this year. I've read before, and it's being echoed a lot on here, that they're tough to get with a blunt, so I came up with these last year, just didn't get a chance to use them. They started as a 100 gr 4 blade I had left over from my compound days. I hacked on them with a dremel tool to get them like I wanted them and added an empty pistol case for extra weight and a little added blunt force trauma. My three hunting bows are tuned with either 150 or 190 gr points. A 357 and 44 magnum case gets me within about 4 grains of 150 and 190 respectively.
Matt