IMR 4350 / 4831 vs H 4350 / 4831

Paztec24

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michigan
I have been working up a load for my 25-06 for bullets ranging from 100 gr through 117 gr. I have a hard time finding H4350 info and have to ask here and other sites, look in old manuals, Hodgdon website etc…. The info is hard to find. IMR on the other hand is readily available everywhere. With H4350 being temperature insensitive and IMR not, why do people shoot IMR over Hodgdons and what is the difference between the two?
 
I always preferred H4350 over the IMR4350 for multiple reasons.

IMR goes through the powder measure about as smooth as ten penny nails. Plus H4350 is less temperature sensitive. Used it in my 6MM for Prarie dogs. In SD this time of the year 100° is just another day.
 
I 4350 is a pretty decent powder, and I've used it for 30 years in my 30-06 pushing 165 grain bullets. It doesn't bleed that much speed in cold weather and always shoots about 1/2 moa groups with decent sd's over the chrono also. That said, I'm not paying a serious premium for it over Vit., Hodgdon, or Shooters world powders. If I've gotta pay 20 bucks more a # than the others they can keep it.
 
My 25-06 prefers H4831 over IMR 4831. I use the Short Cut version because it meters well. My .270 prefers IMR 4350 over H4350. Feed it what it likes best. In my area H4350 is all over the shelves and almost $20.00 less than IMR 4350. So if I ran out of IMR the H4350 is close enough to replace it.
 
Try Shooters World SW 4350, slightly slower than other 4350's & available & less cost. Has similar temperature & other qualities as H4350 but is slower.

For the .25-06 other available powders that would work for 100 - 120 grain bullets that have not been mentioned above are VN 165 & Staball HD. Ram Shot Grand is another. Look for more ball powders for future use.
 
IMR 4350 and 4831 are slightly faster burning than H4350 and 4831 respectively. Thats probably why you see more load date for IMR in 25-06. You will find that IMR 4831 seems to be a perfect powder for 25-06. Don't worry about temp sensitivity. You're really not going to see much difference out to 500yards. Past that it will start to show more. 25-06 kind fizzles out as a hunting gun around 600 yards in my opinion, which makes the heat sensitivity kind of a moot point. I been shooting critters out to 500- 600yds with the 115 ballistic temp long before I knew what temp sensitivity was.
 
Well, before we had the internet, most all reloaders didn’t have a clue about temperature sensitivity so imr powders worked extremely well, but now that we are more enlightened, I guess they really suck, except the individuals who use them and get great results from said powder. Imr 4831 has worked very well in all my 7 mags, not stellar speeds but accuracy never disappoints, imr 4350 in the .06 is hard to beat as well
 
If you go with H4831 use the "SC" Short cut version. It meters great and is the same as the regular in load data and burn rate.
I just picked up a couple # of h4831sc today. A local shop was willing to give a bit of discount to get it off the shelf. I normally use i4831 or h3831 long cut. The sc has always been a bit lower vel. for me when it pressures out. Many moons ago I had a 300win driving 180's that was a full hundred fps slower with sc.. I usually weigh powder for the bigger rifles, so the cut length means nothing to me.
 
I started with imr's in 4320, 4350 and 4831 40 years ago and still use them. All testing/development is done @ 85-95* and rarely shoot when under 50*. Loads for 264wm and 270win powders. Having newer 270win's and 264wm's I'm going to try a variety of powders.........big game, hunter, vv's, lrt, alliant and maybe some hodgdon's?
 
I started with imr's in 4320, 4350 and 4831 40 years ago and still use them. All testing/development is done @ 85-95* and rarely shoot when under 50*. Loads for 264wm and 270win powders. Having newer 270win's and 264wm's I'm going to try a variety of powders.........big game, hunter, vv's, lrt, alliant and maybe some hodgdon's?
4320... a good powder gone too soon...
 
As mentioned, the H4350 & H4381 are faster burning than their IMR counterparts.

I've noticed that availability is a geographic phenomenon.
Some areas have a ready supply of Hodgdon, while others have IMR.
Ditto Ramshot and Norma.

Vihtavouri used to be the more expensive powder. Not so right now. And their entire line is locally available.
 
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