Are H4350 and IMR4350 the same powder?

[mattri]

Tried a search, sorry if this has been covered.

Does anyone know if H4350 and IMR4350 are the same powder in different packaging like H414 and W760?

 

[dkhunt14]

No they are not. Usually IMR is faster.

 

[2506]

Yep IMR4350 is a bit faster than H4350. I have found that Accurate 4350 runs neck and neck with IMR 4350 though. I used the same loads and get the same results.

 

[Laurie]

No, they come from factories in opposite hemispheres. IMR-4350 is the continuation of the venerable US DuPont Corp product now made in Canada. H4350 is a relabelled US version of ADI AR2209 made by Thales / ADI in Mulwala, New South Wales, Australia.

All Hodgdon extruded powders are made by ADI as is IMR-8208 XBR, and Hodgdon's ball and flattened ball powders are made in the US by the St. Marks Powder co., St. Marks, Florida. There are some crossovers there which is what you're thinking of H414 and Winchester 760 being the same thing and B-LC(2) and W748 only slightly different. Likewise some Winchester and Hodgdon pistol / shotgun powders are identical or very close.

You can see the Hodgdon / ADI link here:

http://bulletin.accurateshooter.com/2008/04/hodgdon-and-adi-powder-equivalents/

and ADI has its own handloading data which usefully supplements Hodgdon's excellent spread, here:

http://adi-powders.com.au/handloaders-guide/