Is H414 really temperature sensitive? I bought 8 pounds yesterday for $80 on a close out special. I thought hell for that price I couldn't pass it up. I've heard that this powder I have to careful with at temps above 90, how much truth is there to this.

I have no idea, but have burned up a lot of it. I always have a habit of working up my new loads when it is 90-100 just to be safe and used H414 in a 7x57 in Africa. Below 0 and over 100 it may be temp sensitive, but how much do you hunt at those temps?

I use H414 in my 338-06AI with 225gr Barnes X bullets. I worked up a fast and accurate load, then took it to northern Namibia where it was scorching hot. Bench checked to see if POA had changed; it didn't. No pressure signs either.

Some say H414 is similar to or identical with W760. I've never had temp related problems with either. I think you scored a good deal at $10 a pound.

As crazy as this is going to sound I've seen data a couple times in different tests where it had pressure spikes when it got cold out. (below 0 fahrenhite) Maybe it didn't ignite well and nearly caused a hang fire in these tests....I can't explain it.

H-414 and W-760 are reputed to be just different lots of the same powder, just as H-450 and WMR or HP-38 and W-321 are considered different lots of the same powder.
I use W-760 in my 7x57 and do my load work up in Southern Arizona's summers. Temperatures can range from the high 90s to up to 115 degrees. Probably 100 to 105 is more common. I've had no problem with elevated pressures due to the high heat with W-760 and temperatures during most of the areas I hunt usually don't go below 32 degrees, at least not in most of my der hunting areas. If W-760 is temperature sensitive, it must be at a lower temperature than what I experience in my hunting area.
Regarding primers, I only use the standard Winchester WLR primers and they've worked just fine.
Paul B.

Some/lots of loads call for magnum primers with H414,check manuals,i know it will hang fire everytime in a 300H&H with just cci 200 primers.I like H414 powder in the 243,30-06.No problems...

Like Paul B, I use H414 in my 7x57 and 7mm08. Have had many sessions at the range in temps approaching 100 without my chrono showing excessive speed swings.

I use H-414 in 22-250, 6MM Rem, .257 Riberts, 7 X 57, 6.5 X 55 and the 30-06.....I use magnum primers even though I suspect I don't ned to.

I wouldn't hesitate to use H-414 in any hunting extreme I hunt in and that's 0 deg F to 100 deg F

This temp sensitive stuff is over worked IMO.

quote:

This temp sensitive stuff is over worked IMO

I agree. I've never seen it as an issue. Looking at the Hodgdon site where they are touting their Extreme line they compare their powder agains numerous others using a 0-125Deg temperature swing. RL-22 has had bad press for years for this issue is shown with only 75FPS swing over 125deg.

Thanks guys, I wasn't too worried. I've never used this or W760 before but I might go back and buy the 8 lb can of 760 that they are selling for $90. I've never used either powder but thought I'd ask.

If somebody offered me a can of W-760 for that price, I'd be all over it like stink on poop.
Paul B.

Hell of a buy!!!!!!

quote:

Originally posted by Paul B:
If somebody offered me a can of W-760 for that price, I'd be all over it like stink on poop.
Paul B.

Well, it has been published in supposedly reliable shooting rags that WW760 and H414 are the same powder: same factory, same specs, but different lots.

I really like H414 in the .308 Win. However, it seems to like near-maximum loads. That was with 168 grain Sierras.

Your choice of primer probably should be dictated by the capacity of the case and just exactly whose primer you intend to use. Winchester standard Large Rifle primers are a good deal hotter than most other standard Large Rifle primers and so, one might get by with the standard. WW primers have been made for use with ball powders since WWII.

i use H414 in my favorite PDing swift and its well over 90 out there in them dog fields, with no problems