IMR- 4350 & h4350 - The Outdoor Community
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post #1 of 8 (permalink) Old 04-27-2011, 04:52 PM Thread Starter
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IMR- 4350 & h4350

I'm just wondering if Imr-4350 and hodgedons 4350 are the same because it seems like three different companies have a 4350 and I was just wondering if they are the Same or completely different
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post #2 of 8 (permalink) Old 04-27-2011, 04:59 PM
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Re: IMR- 4350 & h4350

Similar... But different. May produce different results, always start low and work up. Disclaimer Goes Here....

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post #3 of 8 (permalink) Old 04-27-2011, 05:54 PM
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Re: IMR- 4350 & h4350

You need to go with what the manuals say, they are not interchangeable.

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post #4 of 8 (permalink) Old 04-27-2011, 06:35 PM
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Re: IMR- 4350 & h4350

i think the H line is an "extreme" powder that isnt as susceptible to temp changes etc...

ive read it burns slightly different and cant remember if most were finding they need a little more or a little less to hit the same accuracy as the non-H line...also heard it can be slightly less accurate than the non-H line...

could be totally wrong...i have it some H4350 because thats all the local guy carries now..seems he converted to the H line..i figure i better try to shoot what he stocks as hes the only one around that stocks powder anymore..
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post #5 of 8 (permalink) Old 04-27-2011, 07:01 PM
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Re: IMR- 4350 & h4350

Like TheDutchy said, similar but different. I've substituted H4350 for IMR in both my 8mm-06 and 7x57mm. Start low and work up and watch for pressure signs.

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post #6 of 8 (permalink) Old 04-29-2011, 05:00 PM
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Re: IMR- 4350 & h4350

IMR4350 is slower burning than "H".
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post #7 of 8 (permalink) Old 04-29-2011, 06:04 PM
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Re: IMR- 4350 & h4350

In my .30-06 rifles, IMR4350 works better than H4350 with 150 gr bullets. With 165 gr bullets, H is just as accurate, and gets a little more velocity.

H4350 meters a little better through the powder measure.

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post #8 of 8 (permalink) Old 05-01-2011, 05:00 PM
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Re: IMR- 4350 & h4350

4350's from different manufacturers are not the same, so proceed with caution and adhere to load table recommendations from the various manuals. Even different lots of the same powder from the same manufacturer are not always exactly the same, so approach each new batch with cognizance.

Powder burn rates categorized by fastest to slowest:
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