I never said the first shot was a guaranteed stop. But u can bet after the first shot is placed correctly the follow ups (if needed be) will come with ease. You wont have to get in a hurry to blast off all ur ammo. For the fact the perp will likely not be going anywhere fast.

Of course if the first shot isnt placed correctly. Then u'll likely be shooting at a perp like he's a scared rabbit jumping around trying to dodge bullets. Of course in this case, u'll likely need follow ups and even more so u'll likely need about 3 more mags. But the problem here is the "shooter". Lack of training with his/her defense weapon.