Step 4: Load you magazine.
Place you hand around the magazine and (as shown) use your thumb to push the rounds into the magazine.
Once your last round is inside of the magazine remove the clip. Repeat the process until your magazine is full then remove the tool and your ready to go!
Proper technique may take a magazine or two in order to master, but with a little patience and a little practice you can get really quick at doing this.
My first instructable, so be kind!