Marcus,
Can't really help you on loads. Niether I nor any of my family actually have an Auto Mag yet. My father has a friend that has a fairly large collection of them however. He was having some problems with getting his MA license renewed on time and temporarily was going to transfer the guns to an FFL friend or our family down here so as not to get in trouble with MA laws. Anyways long story short, his license did get renewed on time at the last minute, for some reason I forget all his ammo ended up at my fathers house. I'm positive he won't mind if some get's shot up, my father has had it for over a year now. I'll see if he has any in .44AMP and if so I can probably bring you a couple boxes - no charge. I'll let you know.
As for the shoot, I'll definitely be there, but may have to beg out early around 1 or so to go do some rock climbing out near Reading.