H4350 vs. IMR4350 ???

[scamp62]

What is the difference ? are they compatible ??
An information would be appreciated

[bsumoba]

IMR4350 is probably a little hotter than H4350 so proceed with caution and work up your loads. IMR4350 is considered to be a little more temperature sensitive than H4350.

[cleonard]

Close but not interchangeable. If you look at some reloading manuals they will have slightly different load weights. I know that the IMR is about 2% denser than the Hodgdon.

[Divernhunter]

Do not interchange the powders. They are not the same like Win760 and H414 are.

[pacrat]

The guys above gave you solid answers.

Now a bit of oldtimer trivia. Yes, they are different. But long ago they were the same. Because Hodgdon got his start buying surplus IMR powder from the government in bulk. Then simply repackaging it under their name. IIRC, they then started making powder themselves. Hence the difference. Then they bought out IMR from Dupont. And the two remain different.

Hodgdon, IMR, Winchester, and GOEX black powder are all made by Hodgdon today at different facilities.

[bigdawg86]

If they are so close why is H4350 sold out everywhere and IMR4350 is readily available?

[jtake]

H4350 is the go-to powder for use in 6.5cm and a number of other loads. With the new Ruger Precision Rifle in 6.5cm, demand for it had outstripped supply.

[ar15barrels]

IMR4350 is considered to be a little more temperature sensitive than H4350.

The difference in temperature sensetivity is so small that most people would never be able to notice it.

On a tuned load where you can get to 8fps ES with H4350 and then see a 20fps change over 20 degrees weather change, you might see 25fps change with IMR 4350 over that same 20 degrees temperature change.
People WAY over-think the importance of how temperature sensitive powders are...

5fps difference at 1000yds will equate to way less than 1/10 mil of elevation shift difference between the two powders.

[ar15barrels]

If they are so close why is H4350 sold out everywhere and IMR4350 is readily available?

Because people mistakenly believe that H4350 is actually superior enough to IMR4350 to actually matter on target.

[liber]

Because people mistakenly believe that H4350 is actually superior enough to IMR4350 to actually matter on target.

That could be said for any powder. Try to convince someone that insists on getting Varget that there are other equivalent powders out there! Probably ain't gonna happen. Truth is that most all powders get a reputation for how they shoot, and that's something that happens over a long period of time.

Do you use IMR 4350? I suspect so as I see you sell it in the Private sales. What do you load with it? H4350 is darn hard to find right now.

[bsumoba]

Because people mistakenly believe that H4350 is actually superior enough to IMR4350 to actually matter on target.

I hope more people buy IMR 4350. More H4350 for me

I feel like shooting is every bit mental as it is physical and for me, I am very confident with the "H" powders.

That being said, I have a pound of IMR 4451 I'm going to try.

[liber]

I am very confident with the "H" powders.

I like H powders also, however I also like IMR 8208 XBR for 308. It meters much better than Varget on my Dillon.

[bigdawg86]

Because people mistakenly believe that H4350 is actually superior enough to IMR4350 to actually matter on target.

Interestingly enough I just received Lyman's 50th reloading manual and it doesn't use H4350, only IMR4350... It also was the most accurate powder tested.

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[liber]

Interestingly enough I just received Lyman's 50th reloading manual and it doesn't use H4350, only IMR4350... It also was the most accurate powder tested.

Sent from my SM-G900V using Tapatalk

bigdawg,

Is that for 6.5CD ? If so, what other powders do they compare to?

[bigdawg86]

bigdawg,

Is that for 6.5CD ? If so, what other powders do they compare to?

I take a picture and post it later

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