Ok, ok....I'll buy a couple of cases for the new M1A.
You may want to reconsider running this stuff through an M1A, or any rifle with a cast receiver. I'm no expert by any stretch but I've heard from others on some US forums that Springfield warns against using this ammo in their firearms. Apparently the South African 7.62x51 is loaded much hotter than your standard NATO stuff. Like I said I'm certainly not an expert but it's something you may want to look into, It'd be a shame to destroy a $2000 rifle or worse, get hurt in the process.
This is where I read this ammo may not be safe for use in1A's www.ar15.com/archive/topic.HTML?b=3&f=16&t=324486
Pretty sure this stuff was from the auction at Wards this weekend in Edmonton..if so it was listed there as non corrosive there..was a huge pile of it there for sale