Shooting squirrels in town with CB 22's, I found that many escaped to live another day. When I did fatally connect, i could see evidence of the critter having been shot previously. I started filing the tips to a wad cutter profile, and the tree rats started hitting the ground for good. Accuracy was not affected.
Charlie
CCI .22LR SGB Small Game Bullets have ~3/32" flat meplat as well to improve terminal performance on squirrels and such...
https://www.cci-ammunition.com/products/detail.aspx?use=2&loadNo=0058
