Again, you are mistaken. My S&W 625-8 and my 625-10 are both firearms. I do not have a "speed loader" for those guns (well, actually somewhere in my range bag I do have a speed loader that I sometimes use with the 625-10 when I am loading it with .45 Auto Rim ammo, but when I use .45 ACP ammo, which is most of the time, I use the clips). I do have full-moonclips and half-moonclips which I use to load my handguns. When the handgun is loaded, the moonclip is physically inside the gun, whereas with speed loaders, once the speed loader dispenses the cartridges, the speed loader is removed from the gun. Neither of those handguns uses a magazine. Each of those handguns uses a clip.
If it stays inside the weapon then it is a magazine.
An easy way to tell an "ammo clip" from a "magazine" is that a magazine contains a spring and or a follower that actually feeds the ammo. A clip does not. My Italian Carcano and M1 Garand use clips which leave the weapon when the last round is fired. My AR15 uses a "detachable" magazine. I have military ammo in .223 and M1 carbine that comes loaded into "stripper clips" for quickly charging magazines. My Mauser K98 and Russian SKS also use stripper clips to quickly load the rifle's non-removable magazine. All of these SWAT guys were using AR or HK type carbines with twenty to thirty-two round detachable magazines. I doubt that they all actually emptied their magazines at this perp.