Most of the time i had to play with a sporter/gun it was without a magazine simply because in most case i will find a better weapon with ammo before i find a magazine for my sporter/gun. It is a challenging gameplay but if you manage to come sneaky, flank the guy, you may have a clear headshot, kill him, or at least put him unconscious, that's perfectly fine for me and i believe it should be played that way.. but sometimes, you have just no choice, you are not the hunter, but the prey... and you might me be stroke first for many reasons, or you could just have to do a face to face surprise gunfight. On both of those cases, your chances to survive are near the zero if the enemy have a decent weapon...
Most of you will probably understand why, but still i will explain.. sometimes when you have a gunfight in face to face, and you have no way to hide because you are in a middle of nowhere or just because the enemy is rushing you behind the structures... Your last hope is to move quickly to avoid few shots, doing some slaloming moves, and try to chamber at same time, but... as soon you will open your inventory to drag and drop the needed ammo to your gun, you control no more the direction of your character, and even worse if you use the turbo key instead of the fast forward one it will reduce your movement speed, doing so will make you a free kill for a second which is more than enough for an average player..
This will make chamber weapon more competitive, and make the IZH-18, a little more interesting. i personally believe this adding won't make the game worse, it will slightly improve your chances to survive as early player, and in case of a gunfight you will still have to dodge while you chamber, which is more than enough when you already have to handle the stress of the surprise effect.