I have owned several Swifts over the past 35 years, and am totally convinced that it is the ultimate 22 Centerfire varmint cartridge. While I have owned (and do own) other 22 centerfires, nothing is as dramatic as the Swift with a 50-55 grain rapid expanding bullet. A crow shot will turn to a puff of black feather-dust. I have shot Columbian ground squirrels when they were sitting on a snow patch in the spring, and it turns a large area of snow red, with little else to see. I get 4050 with a 50 Ballistic Tip, and 3975 with the 55. These bullets are "bombs" when they hit a varmint. I have had the 50 BT stay in a coyote many times (No exit) Great if you want to save the hides. Long live the Swift! Eagleye.