Here is a good video showing the loading procedure for the M249.
I'm going to disagree with you a bit 44 AMP
. From my understanding you NEVER NEVER NEVER
reload a M249 with the bolt forward. You always retract the bolt before poping the cover.
The reason is that it is a bad habit to get into. If you pop the cover with the bolt forward after shooting, you potentially have the bolt forward on a dud round which could cook off while the cover is open.