9mm M882 powder

[daschnoz]

Does anyone know the closest canister match to HPC-33 or WPR280?
- OR -
How can I get the specific chemical makeup of individual powders from the manufacturers?

If not, I'll just get myself a can of HS-6 and be done with it.



---- now the "why" part of the question ----



I'm looking to duplicate the M882 loading, and I like to keep things as close to mil as possible. Finding the components...
124gr FMJ projectile - easy
brass - easy
primer - easy
powder - proving to be a pain in the @$$

Older pubs spec. between 5gr and 6gr of HPC-26 as the propellant for this round. Somewhere online, I found that HPC-26 is a flake. It would appear that HPC-26 is no longer being used for this round. I read some report someplace that HPC-26 was generating very high chamber pressures at extreamly low temperatures, so it was replaced.

Then today, I found this
http://www.epa.gov/Region1/mmr/pdfs/269650.pdf

In appendix B, it lists 5.2gr of HPC-33 as the primary propellant, with 5.2gr of WPR280 as an alternate.

Looking at the chemical makeup of the 2 propellants, I can see that they are both double based (nitrocellulose + nitroglycerin). HPC-33 is most likely a flake - like its #26 cousin, while WPR280 is most likely a ball (Hodgdon's MSDS for their ball powders lists WPR as a synonym... interesting...)

I'm trying to find the closest canister propellant to either of these, but Allient seems to be the only company that has MSDS data for individual powders, all of which are flakes with high nitroglycerin content. Everyone else gives a generic sheet that covers all of their ball powders with ranges like chemical X, 0-12%. I'm looking for a specific set of numbers, so that's no help.



Like I said, maybe I should just get a canister if HS-6...