A powder question

[Beekeeper]

I know Hogdon now owns IMR but just what is the diference in H4895 and IMR 4895?
Can one be substuted for the other?
Inquireing minds want know before blowing mind up!


beekeeper

[Larry Gibson]

Generally I do not substitute one powder for another but with cast bullet pressures 4895 is most often an exception. H4895 is smaller grained and throws more consistent charge weights from my Lyman 55s than does IMR 4895. H4895 also seems a little faster burning than IMR4895. You can also get a little more H4895 in some cases where capacity is an issue, 7.62x39 with 150+ gr bullets for example.

Larry Gibson

[azrednek]

If you're familiar with the history you can see the difference. Hodgden started selling military surplus 4895 years ago. Dupont came along with their Improved Military Rifle (IMR) 4895 powder and there was a slight difference or as Dupont claimed an improvement. If the difference still exists today it should be answered by Hogdgen.

[uncle joe]

If you're familiar with the history you can see the difference. Hodgden started selling military surplus 4895 years ago. Dupont came along with their Improved Military Rifle (IMR) 4895 powder and there was a slight difference or as Dupont claimed an improvement. If the difference still exists today it should be answered by Hogdgen.

This is very true. This along with my lack of attention to detail caused some flattened primers in my 30-06 many years ago before Hodgdon bought out IMR powder. They should now change the formula to be one or the other. Just my two cents.

[Glen]

The two 4895s are the same, and can be substituted for one another.

The two 4350s are slightly different from one another, and the two 4831s are notably different from one another.

[crowbeaner]

Factually, the Hodgdon 4895 is made in Australia; the IMR version is made in Canada. The Aussie powder is just a bit hotter than the IMR stuff.

[NHlever]

I think this is why you often see data for H4895 if only one is listed. It does seem to be a bit hotter than the IMR4895. I would use H4895 data with IMR4895 powder using proper caution, but I would sure back off a bit more if I wanted to do it the other way around.

[runfiverun]

the formulations are different.
i have changed from one to the other for a different result in accuracy.
the granulations are different too.
burn rate is dang close considered the same.

[Potsy]

Start a little low and run a couple over your chronograph (if you don't have one, spend 80 bucks) and have no fear.
Plenty of powders are similar, some are the "same thing"; but even lot to lot variations of the same powder can get you in trouble under the right conditions.

[aletheuo]

Beekeeper:
I asked John Barsness a question on 24hrcf recently: Can I reduce imr4895 to 60% the same as h4895 recommends on their youth loads? He feels they both behave very similarly in reduced loads. I currently use IMR4895 for my reduced loads in 7RM.

Crowbeaner:
Thank you for letting me know IMR powders are made in Canada. I had no idea! I now know that if I have a choice between H and IMR I will choose IMR since I am supporting my country.

[leadman]

Glen, there are three 4350s. Acurrate has one also that alot of people forget about.

I have some of the old surplus 4895 and new H4895. I find the old surplus lot I have faster than the new H4895 by 2 grains in the 30-06 M-1 Garand.

I also have some Hodgdon 4831 marked as WWII surplus and it is faster than new H4831.

[Junior1942]

I have about three lbs left in an eight lb jug of surplus 4895 I bought a couple of years ago. It seems to be a little slower than H4895.

Richard Lee says there's an allowable 17% lot-to-lot variation in powders. In other words, work up again when getting a new can of the same powder, much less a different brand of powder. That 17% allowable variation is why I buy eight lb jugs of powders I use a lot.

[PAT303]

Most hodgdon rifle powders are made in Australia and are some of the best made.All law inforcement ammunition is loaded with it as is federal dangerous game rounds as it is very stable over a wide range of temps and conditions.Making powder is one thing that we do well. Pat

[44man]

Most hodgdon rifle powders are made in Australia and are some of the best made.All law inforcement ammunition is loaded with it as is federal dangerous game rounds as it is very stable over a wide range of temps and conditions.Making powder is one thing that we do well. Pat
Hard to believe such a liberal, anti gun country makes good powder. But I agree. When are you fellas going to dump the government?
I should not talk, nuts over here voted in a worse nut. We are in BIG trouble. England wants to take away sharp knives and for a country that dominated half the world at one time with arms, it shows what liberals can do to destroy freedoms. If you protect your family's life, you go to jail. The criminal walks.
Can we send you millions of Mexicans?