Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature changes

[RockZ]

That's very interesting info
I expected it to be better after reading this Hodgdon
press release
Hodgdon US869 Powder

[Mikecr]

I use a bunch of Hodgdon powders for sure. But never believed any of their marketing hype for a second. You might notice it has no actual basis..

They make good powders that we need, but it's embarrassing how we fall for pretty much anything shoveled our way..

[jwp475]

How did you determine a lack of "actual basis"???

[phorwath]

Len,
I haven't tried H4350 or H4831. But I've run H1000 and Retumbo loads in 7mm Rem Mag, 300 Win Mag, and .280 RCBS Improved class cartridges over the chronographs in these two extremes:
1) Rifle and ammo stored in house @ ~70F and walk out the door to fire over chronographs located adjacent to the house.
2) Rifle and ammo stored in chest freezer @ ~0 to -5F, and pulled from chest freezer and fired over chronographs.

These two Hodgdon powders showed very little difference in muzzle velocity. The H1000 in the .280 RCBS Imp MV was basically the same.

The drop in velocity when I did the same test with IMR 7828 was dramatic, in comparison. But as I stated, I haven't tried it with H4350 or H4831. It all takes time and I'm currently not using those two powders in any hunting loads.

[Mikecr]

Originally Posted by jwp475

How did you determine a lack of "actual basis"???

I haven't found where Hodgdon has provided any.

[RockZ]

the press release link provides temperature and velocity data

[Michael Eichele]

Lets just say that you should not believe every thing you read on the internet.