Does anyone have a temperature stability chart for powders handy?

[bigmountainrider]

I'm half was done my 300wm distance gun project, I need to choose a powder to start my reloading ladder. I chose Varget for my 308 as it is very temperature stable. I would like to do the same with the 300. Any help would be great.

 

[100zero]

Ive had great results with H1000. I chose it after lots of online research saying its a go to powder for the 300wm. So i bought a bottle and tested it out. And what i do when i find a good load is put 5 rounds in the freezer for a couple hours and shoot those and see the speed and POI change.

 

[bigmountainrider]

I just found that chart, it looks like the best options are Hodgdon H4831SC Superformance at 0.08fps/*f, H1000 at 0.21fps/*f and Retumbo At 0.49fps/*f. IMR-4831 changes at 1.10fps/*f, IMR-7828 at 1.36fps/*f and Reloader-25 at 1.59fps/*f.

I think I will likely go with the H1000 due to availability, Has anyone seen H4831SC Superformance regularly sold?

 

[cdn shooter]

It's just H4831sc, superformance is a different powder. The H1000 advice is good if you're shooting bullets at around 200gr and higher. If you're running 168-178gr range go for H4831sc.

 

[beeman2]

H1000 can also work with lighter bullets. I use it in my 25-06AI with 115 Bergers. Also use H1000 for shooting 215 Bergers out of my 300 WIN MAG. It does seem very temp stable and they say it is also a cooler burning powder that's easier on throats.

 

[hometownhero]

Pretty much anything in the h1000 burn rate area. H1000, rl 26, retumbo

 

[Troy G]

Pretty much anything in the h1000 burn rate area. H1000, rl 26, retumbo

Do you have experience with RL-26? Heard it was not temp stable just got some to play with.

 

[hometownhero]

Don’t have anything big enough to use it in.

This is what Alliant says


Achieve awesome ballistics with new Reloder® 26 from Alliant Powder®. The propellant's burn speed falls between that of Reloder® 22 and Reloder® 33, and it incorporates EI® technology to produce extremely high velocities in magnum cartridges. Reloder 26 has a high bulk density that allows larger powder charges, and it provides a consistent, controlled response to temperature changes.
EI technology produces extremely high velocities in magnum cartridges
Contains proprietary de-coppering additive
Controlled temperature stability
Excellent lot-to-lot consistency
Formulation contains no DNT or DBP
Made in Switzerland for Alliant powder

 

[ruger-ruger]

300 win mag ??
H 1000 and a 215 berger. And you won't look back
You can pm me for any load details if you would like.