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Difference between H4350 and IMR4350

Discussion in 'Handloading and Reloading' started by viking499, Nov 12, 2008.

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  1. viking499

    viking499 Member

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    What is the difference between these 2 powders?
     
  2. Curt Blunt

    Curt Blunt Member

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    H4350 is somewhat slower burning than IMR4350. H is made in Australia and is temperature insensitive, while IMR is Canadian. I believe the H version has shorter granules and appears greenish while the IMR version appears black.

    I've only used IMR but both powders get good reviews. You can check out www.hodgdon.com since Hodgdon distrubutes both powders.
     
  3. evan price

    evan price Member

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    +1, IMR is a teeny bit faster, it is right above H4350 on the burn speed chart. They are one atop the other. So no real significant difference except for H4350 has shortened grains now and a coating to make it temp nonsensitive.

    (Oh, yeah, +1 on Mr. Blunt, above. Helps if I read the responses before answering myself)
     
  4. ArchAngelCD

    ArchAngelCD Member

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    I've used both in my 30-06 rounds and have settled on H4350 because in my rifles I seem to get better accuracy from H4350 than I do with IMR4350.
     
  5. ants

    ants Member

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    That's interesting, ArchAngel. Thanks for the info. I've only used the IMR version. It is reasonably good in my 30-06 and 270. Each rifle seems to have a favorite.

    Anyone else compare accuracy between the two? Tell us the caliber and barrel length, and which one was better.
     
  6. 243winxb

    243winxb Member

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    Totally different powders.
     
  7. 10 Spot Terminator

    10 Spot Terminator Member

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    IMR4350 tends to have a faster burn rate than H4350 and
    generates slightly higher pressures in equal grain weights so for heavens sake dont get them confused . The IMR has for me proven to excell in the heavier hot side loads in many calibres for me as where the Hodgdon was better in heavy bullet weight loads for calibre not redily known for higher velocity . Examples for me would be IMR4350 in my 300 Win Mag and my 243 where the H4350 worked better in my 30-06 and my 6.5x55 Swede . Both are VERY good powders in their own right .
     
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