Imr 4831 & h 4831

[treerooster]

Are these two powders the same?

 

[redneckdan]

Not exactly, one is faster burning than the other.

 

[duckriverdave]

I use H4831 in my 270 loaded with 140gr. Accubonds.

drd

 

[NCsmitty]

If you view www.hodgdon.com and select your cartridge, you can see the difference yourself.



NCsmitty

 

[treerooster]

yea thats what i use in my 270 win 130grn accubonds. was thinking of loading up some 100grn hornady bullets. It calls for the IMR 4831 instead of the H4831. I just wanted to make sure they were not the same. did not really want to buy new powder for this load but if i need to i will. thanks for the replies


Brent

 

[duckriverdave]

When I got my 270, a guy at the gun club said to get some 4831. The shooting supply in town had Hodgdon 4831SC. They said it would meter better, so I got it. I am very satisified with H4831SC.

I have some RL15 that I am going to try with the 140gr. Accubonds. I also am going to try IMR4895 in the 130gr. ballistic tips.

Dave

 

[NCsmitty]

You'll find that with the lighter bullets such as 90-100gr, H4350, IMR4350, H414/Win760 will give you top velocities and hopefully good accuracy.



NCsmitty

 

[JimKirk]

IMR4831 is the fastest of the two.
You can use data using H4831 in place of IMR4831, but not IMR4831 in place of H4831.
I'm not sure why IMR(dupont) did not name it IMR4931 then there would not have been near as many mix ups!

Jimmy K

 

[ArchAngelCD]

From what I can tell none of the IMR and Hodgdon powders with the same name are the same powders. Like said above, they are close but not the same.

 

[Jim Watson]

Since Hodgdon got the distributorship, they have been blurring the lines a bit.
But I think IMR 4831 is still made in Canada, H4831 in Australia.

I'm not sure why IMR(dupont) did not name it IMR4931 then there would not have been near as many mix ups!

Because originally, it was all IMR 4831. Made for military use by DuPont, Hodgdon sold it surplus after WW II. They started out calling it "4350 Data Powder" because if you loaded it like 4350 you would be safe because of the slower burn rate. Eventually they set up and developed specific loads and listed it as H4831. It was years later that DuPont realized there was actually a commercial market for a powder that slow and they started selling it under the IMR label. It soon became obvious that the H and IMR 4831s were of different burning rate. Hodgdon said DuPont was making it to a different specification than they did during WW II. DuPont said Hodgdon had old stale military powder and that their product was fresh and to the original specs. They both kept selling what they were accustomed to and loaders used what suited them best.

Eventually, Hodgdon's surplus powders ran out and they had them manufactured under contract. First by ICI Nobel in Scotland, now by ADI in Australia. DuPont moved smokeless powder manufacture to Canada and eventually got out of the business altogether. Now Hodgdon distributes both their own brand and IMR's. As well as Winchester but that is another story.

 

[jon_in_wv]

I wouldn't interchange them personally. I use both powders for my 7mm Remington Mag and while the loads are close the maximums are different. It would be easy to over load a round by 3-4 grains by using the wrong load.

 

[USSR]

While there's not a lot of difference between the IMR and Hodgdon flavors of 4350, as previously stated, IMR4831 is quite a bit faster than H4831.

Don

 

[JimKirk]

Then it is Hodgdon fault, they should have named their new powder H4931!
I knew the story but had let it slip my mind, that is what happens when you get old!
At any rate it was just a marketing game for both!
Jimmy K

 

[treerooster]

I will give the 4350 a try with those 100grn bullets. just thinking of trying to load up some for them pesky yotes,. Thanks


Brent

 

[JimKirk]

You may want to try Reloder 17 for the 100 gr bullets. 59 grs. of RL17 gives 3554 fps.
http://www.alliantpowder.com/reload...?gtypeid=2&weight=100&shellid=63&bulletid=119

Jimmy K