If you do a search for either H4227 or IMR 4227, you should come up with a old thread, from about 8 yrs ago.

It was documented in that thread, that Hodgdon replace IMR 4227 with the Australian made H4227 BUT, kept the IMR 4227 name. A profit oriented change.

At the end of the day I'm not convinced that a large conglomerate that controls the availability of a favorite powder to have my best interests at heart, no matter the assurances. The supply chain of our shooting "expendables" has proven time and again in the last 20 years to be unreliable, and fickle at best. I chose to err on the side of caution yesterday and ordered some 4227 to bolster my my small stash. Yes Chicken Little the sky is not falling but by golly there are some fairly big raindrops hitting the ground.

Other alternatives exist, sure, but personally I have more important things to worry about than starting another whole round of experiments to find which of said alternatives are equal to my old "tried and true".

Jim has left some jugs of smokeless powder H-108,XMR4350 and WC820(f).  Can someone tell me the differences in these powders?

Ordinarily this is a good resource for powder comparison, site is currently down for update and maintenance. 

It will have photos and measurements of powders, along with other information. It’s the justice department data base for forensic comparison and identification of powders.

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Thank you so much for your replies.  I have some things that should come back to the Assoc.  Plan on bringing when I get stuff together.

The Australian made ADI AR2205 powder is the equivalent of 4227. This is currently out of production with no anticipated new production or delivery date. Hogdon have previous purchased powder from ADI (Varget for example) so it makes sense that 4227 may be the same and is now in short/ non supply in the US as well.

Disappointing for all of us, regardless of US or AUS.