Announcement on the ADI website:
http://www.adi-powders.com.au/2021/03/2 ... -update-5/
Key message is:
"we’ve now had to make the difficult decision to pause the development project for APS650 and cease attempting production of the existing APS350, APS450 and APS950 products for the foreseeable future"
Some stores still have supplies and may receive future ones if there are stockpiles at the factory or along the supply chain but it is likely that these powders will eventually disappear from shelves for a while. That will leave imported powders but we are likely surviving on existing stockpiles of those already, the above announcement mentions that if ADI ordered Canadian made AP70N now it wouldn't be here till 2023.
Rifle powders appear to be unaffected.