Least Temperature Sensitive Powder

[Lerk]

So what are you guys all finding to be the least temperature sensitive powders to use? I live in central MN so we go anywhere from in the negative degrees to over a 100, and I'd like to use more powders that I do not have to worry about huge variations caused by the temp. Obviously there will always be flucuations, but I'm hoping for minimal wherever possible. Interested specifically for these calibers: .223 Rem, .45 ACP, 10mm, .41 Mag, 12ga, .45-70

 

[rcmodel]

Hodgdon "Extreme" powders are made for just such applications.

However, I have lived, reloaded, shot, and hunted in Kansas and Colorado all my life.
Our temperature here in Kansas can swing 50 degrees or more from one day to the next.

I can't think of even one time powder temperature prevented me from hitting what I shot in all those years.

Me thinks you have other things reloading related to worry about, more important then powder temperature.

rc

 

[Lerk]

I was just thinking along the lines of developing loads in the summer and using them in the middle of winter (or vice-versa) and having to be concerned with retesting them in the opposite type of temp environment. I had just been reading some threads about certain powders that were more sensitive with temperature flucuations that caused things like pressure increases. I'm sure as long as I don't load near the top that any variations probably won't affect anything or see any changes, but I was curious about the subject.

I was specifically thinking of developing a hot .41 magnum load here in the winter athmosphere and have to worry about using the same load on a very hot summer day.

 

[rcmodel]

Hodgdon "Extreme" powders are your best bet then.
http://www.hodgdon.com/extreme.html

And don't develop MAX loads when it is 20 below and then shoot them next summer when it is 100.

rc

 

[WYOMan]

I've read posts that claim that Reloader-22 is VERY temperature sensative, but I've never found that to be the case in my Swede. I've always wondered if certain powders were more or less sensative depending on load volume.

 

[Pacsd]

Varget?

 

[thump_rrr]

IMR XBR (8208) is what I use for .223 using 55gr projectiles.
It is as temperature stable as Varget.
It has virtually no muzzle flash which is why I like using it on compensated guns.
Other people like fireballs.

 

[ArchAngelCD]

Varget?

Very stable...

 

[ArchAngelCD]

So what are you guys all finding to be the least temperature sensitive powders to use? .... Interested specifically for these calibers: .223 Rem, .45 ACP, 10mm, .41 Mag, 12ga, .45-70

For the 45-70 I would and do use H4198 which is one of Hodgdon's Extreme powders.

For the 12ga, I have never heard of shotshells being temp sensitive. They use a very large primer that will set off the powder in most conditions.

I use W231 (HP-38) in the 45 Auto and it works well in all weather conditions. For the 41 Magnum, give W296 a try and even though it might be temp sensitive it really won't matter since you should be using a magnum primer with it anyway which will insure proper ignition in cold weather.

For the 10mm, there's probably nothing better than Longshot and since it's really a shotgun powder it can double in your 12ga loads...

Of course all the above is only my opinion except for the Hodgdon Extreme powders being very stable.

 

[rikman]

+1 Varget