Home Forums Hunting & Shooting Ask The Gunwriters Ramshot magnum, chrony results.

That's about average for IMR4350, in my experience, the reason I mostly use H4350 for hunting instead these days.

It does get a little cold around "Harvey" sometimes!

so what about h4831 how temp stable is it??

cumminscowboy,

FWIW I use H4831 in my 25-06 and I have not seen any difference in POI, velocity or group size due to weather.

MD,

Good to know about the H4350. Might just run that instead.

Thanks, Travis

H4831SC is just as good as H4350 for temp-stability, which is why I use a lot of it too.

Any of you see the article (some time this year, I think?) about supposed temp-insensitive powders? It was saying that the temp insensitivity appears to vary significantly with cartridge, and even then isn't all that insensitive. Part of what the testing indicated made little sense to me, but the rest did. Anyone?

I haven't "tested" the Magnum to see how sensitive it was, but I used it in 1000 yd BR and I kept my ammo in a cooler and fired as soon as I could after chambering it. During a summer match, the ambient temperature of the first string of fire can be a LOT cooler than the third or forth group depending on how many shooters you have to accommodate. I was able to keep my zero and shoot good scores this way. I didn't bother during the winter matches though.

One powder that worked the same for me come rain,sun or cold, was VarGet. I never fired it at zero obviously, it's kinda hard to come by that here in AZ, but I did shoot it in 115 and 25- the differences in velocity were within the SD of the load itself.