.22 is very popular with assassins
but for close range kills
Sundry thoughts.
1) 200 yards is not an easy shot with a 22lr. The attempted assassin had some training on the weapon.
2) I couldn’t make that shot with my 1022. This weapon would have been an upscale one.
3) Chipman (ATF wannabe) did not consider a 22lr, even a semiauto, an assault weapon.