Firearm & Gun Forum - FireArmsTalk.com > Gear & Accessories > Ammunition & Reloading > Another stupid/annoying/tiresome question from me.

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Old 03-04-2012, 05:04 PM   #1
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Default Another stupid/annoying/tiresome question from me.

What the hells the difference between IMR and Hogdon powders??

I see a lot of the same powder numbers being listed to load a lot of the same calibers/weights.

For example h4895 and IMR4895 listed for the same .223, .35 and .30-06 bullets/weights/types.

Also i made a slight mistake (or so i thought/think) when reloading for my .44 mag. carbine. I thought the powder listed in my manual was for IMR 4227 (all i saw was 4227 ) but it was H-4227, so i loaded to the manual specs for best accuracy and it shot just fine with same results as i was getting with my 2400 load. (i also loaded IMR in the .357 and was getting same results with less muzzle flash and less felt recoil as with 2400 load)

am i to assume that they are close to identical powders? (H4227 and IMR4227 and IMR4895 and H4895 etc and so on)

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Old 03-04-2012, 05:20 PM   #2
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If the numbers are the same the powders are ALMOST the same. One is designed to be a clone of the other, but due to different manufacturing techniques and equipment there are small differences. Hodgdon now makes the powders sold under the IMR label as well as the Winchester powders. The H-110 was always rumored to be the same as W-296, but now probably are exactly the same.

Any powder from lot to lot will have slight variations and max loads should be re-worked with caution.

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Old 03-04-2012, 05:21 PM   #3
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They are similar,but they do have different burn rates from what I've been told.
I'm using H4198 in my 458 Socom loads,and all the data calls for IMR4198.

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Old 03-04-2012, 05:28 PM   #4
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COOL BEANS...

So what i am taking from this conversation so far is....so long as i stay away from max loads i will be fine.

I dont max load anything, or even come close...i typically range middle of the road to couple grains hotter per suggested load in the manual.

hmmm mayhaps i will just go to using Hogdon powders instead of IMR if they be cheaper.

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Old 03-04-2012, 08:05 PM   #5
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"Hodgdon now makes the powders sold under the IMR label as well as the Winchester powders."

Hodgdon has bought the plants for both, and Alliant too, but that's not quite the same as "makes the powders". Hodgdon used to buy W-296 from Olin (WW) and put it in their own cannisters as H-110; guess they still do both labels.

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Old 03-04-2012, 10:44 PM   #6
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IMR stands for "Improved Military Rifle."
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Old 03-05-2012, 03:27 AM   #7
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I have read warnings against using different similarly labeled powders more than once. Never done it myself.

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Old 03-05-2012, 01:55 PM   #8
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I have used IMR4895 for many years for all my rifle loads until I got a .223. The IMR granules are big and I experienced a lot of bridging of the granules going through my funnel into the small .223 cases so I bought some H4895.
It flows much better than IMR and produces excellent accuracy in my .223 so I have been experimented with it some in the .308. It is as good as IMR with almost the same charge weight as well as supposedly being less temperature sensative. Also, and maybe it is just my imagination, the H4895 does not seem to create as much black carbon fouling as does IMR4895.
I may try Varget next.

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Old 03-05-2012, 03:11 PM   #9
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I've always used IMR powders. All growing up it all dad used, that's how I started. I shoot a 25-06, 30-06, 300 Winchester magnum, and a 243. The one powder that's been consistent for me through all my rifles has been IMR 4350.

I've recently branched out, I tried retumbo (Hodgden) in my 300, and got some great groups, but it's so slow burning that to get my pressures down I'm down to 2700 fps. (To be fair though I think the gunsmith has the chamber too tight, I'm 5 grains below the listed max.) I'm trying IMR 4831 in it right now.

I've also tried H4831 in my 243. It's been excellent. Grouped at under a minute. I'd like to perfect it a little more. I tried IMR 7828 in it too, I can't decide if I put 2 or 3 in the same hole with it. I'm looking more into that today. I just don't think I can shoot THAT good, (and I've never liked that powder.)

I've used Alliant's Reloader 19, 22, and 25. It's never impressed me. I never get the velocity or accuracy out of them, and I think they burn dirtier.

That's been my experience with powder. Hope it helps.

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Old 03-05-2012, 08:49 PM   #10
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Quote:
Originally Posted by 1hole View Post
"Hodgdon now makes the powders sold under the IMR label as well as the Winchester powders."

Hodgdon has bought the plants for both, and Alliant too, but that's not quite the same as "makes the powders". Hodgdon used to buy W-296 from Olin (WW) and put it in their own cannisters as H-110; guess they still do both labels.
OK, so they bought the plants,, bought the name rights and produce the powders sold under all these name brands. How is that different than what I said in the first place? They bought W-296 from Olin and put it in their own canisters with the H-110 label? That makes them the same powder, right?

I guess I do not understand the semantics of your argument.
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