You will want to get a few of these.
http://www.theammosource.com/index.php?main_page=index&cPath=14_271
I use a 4x4 and I like it. If you can't hold and load 4 rounds try a 3x3.
Just for an idea how fast you can load with them. Keep in mind I'm not too fast.
http://www.youtube.com/watch?v=yVc3H1WkXNc
http://www.theammosource.com/index.php?main_page=index&cPath=14_271
I use a 4x4 and I like it. If you can't hold and load 4 rounds try a 3x3.
Just for an idea how fast you can load with them. Keep in mind I'm not too fast.
http://www.youtube.com/watch?v=yVc3H1WkXNc