Has anyone found out where this stuff is made?

Its not in a multiple of 120, so I dont think that its US.

Have you asked Troy or his new minion.

Sounds like the British Royal Ordnance SS109 to me.  Some have had excellent luck with other have had short stroking failures.  The stuff in bandoleers is generally late 80's vintage.

I have some the late '90's stuff that was packed in 200rd. battle packs.  It is very accurate but I've had 3 apparent short stroke failures though it could have been the mags.  I have more to elaborate on but it's late and I'm tired.

From what I've read here, the SS109 has a weaker charge that USGI ball ammo, so that could be the problem.
And I have seen the ad for the BRO ammo in SGN.
I will probably be ordering some XM193 on payday.