Why wouldn't the two powders exhibit the exact same tolerances if exactly the same powder?
When Norma makes MRP at the end of the day they sweep the floors and then send that to Alliant.
What I have heard and read, and again this differs from MD's experience, is that MRP is canister grade with 10% maximum variation, +/- 5% and that R22 is bulk grade with up to 20% variation, +/- 10%. This fits in with my own experience as I had one of the hot lots of R22 which I think was subject to a recall but I liked the extra velocity so I kept it. Good thing I didn't "splode" anything. This was when I was a hot rod teenager. Also when I compared the two years ago the MRP was darker, it could have been due to being fresher with more solvents as what I have on hand now is basically the same color but the MRP is more uniform.
