Any 5.56 Subsonic Loads Using AA1680?

[robrob]

I know this should really be posted in the "Other Subsonic" forum but I know a bunch of you use AA1680 for 300 Whisper. Do any of you have a subsonic 5.56 load using AA1680? If not do you 1680 experts think it would work with a 72gr 5.56 bullet?

I have a ton of AA1680 that I'm using for the Whisper and I'd love to be able to use it with the 5.56 can I have on order.

Thanks in advance,

Rob