I asked Alliant for load data using R26 in my 28 Nosler build. I also asked about temp sensitivity of their powders. Here is their response...
Eric,
Alliant has three temp stable propellants by their chemistry. These are AR-Comp, Reloder-16 and Reloder-23.* Reloder-26 by its chemistry is not temp stable, but in most applications it behaves much like a temp stable propellant.* The Reloder-33 is not at temp stable propellant. That being said, all of our propellants need to pass, by lot, testing procedures in a wide range of temperatures, wider than any self-respecting human would be hunting or shooting under.
As for load data for the 28 Nosler, Alliant has no tested load data for this cartridge at this time.
I will submit your request to the engineering lab for possible future development. But, there is no timetable as to when this may be looked at for development.
Thanks,
Duane V.
Technical Services Rep
Having read all that....I feel that I'll probably load some R33 and use it for barrel break in. Then I'll probably test it for temp sensitivity before I do very much load work.
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