Originally Posted by
history@mts.net
The original H322 (an extruded powder) WAS IMR8208M that was made here in Canada at the DuPont / IMR plant in Valleyfield, Quebec, the ONLY extruded powder plant in North America. The same place where Accurate LT-32 is made.
When that supply was exhausted, Hodgdon did have some more made at the Nobel plant in Glasgow, Scotland, which was referred to as N322.
WC735 was/is the DP2200 / AA2200 powder, which is also known as SMP735. It is made in the old Olin Western Powder plant in St. Marks, Florida.
There were only three lots of 8208 bought by Thunderbird. One lot proved better for BR cartridges than the other two. That lot was re-named T-322. Hodgdon objected to this since they already had H322 on the market. The name was changed to T-32 and it remained that. The other two lots were sold as T8208, WITH the Lot#. Thunderbird also sold T-2202 (WC844) & T-2208 (WC846), as well as a half-dozen or so other powders.
Some of my old data sheets from Ammomart (Canada's Hodgdon importer) showed Hodgdon H108, H116 (W680), H240, H320, H375, H820 (WC820), H570 (IMR7013), H870 (WC870), H5010 (IMR5010).
If it is a spherical (ball) powder, my guess would be that it is actually H820, a VERY different powder than H322!!!!!