[Zack The Ripper]

Many events have CPs and OPs on the field, like real MilSim should. Hence, bringing it on the field with you. Having a loader and other reloading gear on you rather than always at CP means whenever you arrive at a valid reload spot whether it be an OP, team vehicle, CP, etc means you are able to get BBs back in your mags faster rather than digging through gear going "Where's my speedloader?!".

Like It was stated above, it's theory mostly. Game discretion.