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Thread: H4227, what calibers is this a good fit for?

  1. #1
    Boolit Bub
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    Jun 2011
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    H4227, what calibers is this a good fit for?

    I've been kicking around the web looking for data for this powder. I have found no useful data as yet. I was given two pounds of this by a friend who got it from his dad's estate. I opened a can and it looks good. Can anyone point me in a direction for old H4227 data?
    Click image for larger version. 

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  2. #2
    Boolit Master
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    Try to find a Lee second edition Modern Reloading.

    Look at thirty eight and three fifty seven cartridges. Not sure why my numbers just quit working.

  3. #3
    Boolit Grand Master Outpost75's Avatar
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    Well suited for .32-20, .38-40, .44-40, .30 M1 Carbine, .357 and .44 Magnum. The old military surplus 4227 you have pictured in the paper canisters was probably salvaged WW2 .30 carbine pulldown and also used for the M35 .410 survival shot load.

    Good for cast bullet rifle loads in most .30 cal. cartridges, and for approximating factory velocity in the .32-40, .38-55 and .45-70. 4227 burns a bit slower than Hercules #2400 of the same era.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  4. #4
    Boolit Bub
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    That’s good news! I load .357, 44 mag and 45/70.

  5. #5
    Boolit Master OldBearHair's Avatar
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    Checked Speer manual number 10 and it shows IMR 4227. I looked at .357 and 44 mag. 300 Win mag. Quit looking .

  6. #6
    Boolit Buddy 358429's Avatar
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    I think you will like it in 38/357 especially if you are loading the heavy keith bullets.

    I have had excellent results with IMR4227 in 38 special, 357 magnum in revolvers and a bolt action rifle, and 308 winchester in a lever action and break action rifle.

    At least you should have a starting point to work up safe loads, the older lee books have many loads with 4227 listed.

    Sent from my SM-G930T using Tapatalk

  7. #7
    Boolit Buddy

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    I use it in small case cartridges like 22 Hornet and 17 Hornet

  8. #8
    Boolit Buddy 358429's Avatar
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    Here is a picture of the powder I am using, labeled as IMR 4227.

    Sent from my SM-G930T using Tapatalk

  9. #9
    Boolit Grand Master


    Larry Gibson's Avatar
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    Excellent for all Outpost75 mentions. Additionally I'll add the 7.62x39 with 110 - 125 gr jacketed bullets. Use 22.5 to 23 gr. With 123 gr AK/SKS bullet of .310/.311 diameter it equals milsurp velocity and pressure.
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  10. #10
    Boolit Master
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    I love 4227 in 357 mag, 30 carbine, 45 Colt, 22 Hornet and others.

    It is my go to powder for accuracy testing a new rifle. It consistently gives me the best groups.


    Steve in N CA

  11. #11
    Boolit Master OldBearHair's Avatar
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    IMR 4227 is used in reloading for 350 Legend as well.

  12. #12
    Boolit Master


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    The 1990 IMR publication has data for many cartridges. I like it in 30-30 and it is a standard in the 32-40 for target work.
    Rick

  13. #13
    Boolit Bub
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    I found this for the 45/70. I'm hesitant to use data for new H4227 or IMR 4227 so I'm still looking for published data for this very old H4227.
    Click image for larger version. 

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  14. #14
    Boolit Master Savvy Jack's Avatar
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    My 44-40 tests
    John Kort seemed to prefer H4227

    IMR-4227
    "Blue" Below SAAMI max pressures
    "Green" Group I Weak Action Rifles max loads
    "Red" Group II Strong Action Rifles Only
    Attachment 284685



  15. #15
    Boolit Master Thumbcocker's Avatar
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    I used it in .44 magnum. Got good accuracy. Not quite the velocity as with 2400 or 296 but good accuracy.
    You'll go far providin' you ain't burnt alive or scalped."

    Will Geer as Bear Claw in "Jeramiah Johnson"

  16. #16
    Boolit Grand Master
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    THG … here’s some 4227 loading data for your reading pleasure …. https://www.google.com/search?q=imr%...=firefox-b-1-m
    Regards
    John

  17. #17
    Boolit Master
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    if you go back through the old Lyman manuals or RCBS cast bullet manual there is load data using 4227 peppered throughout them in both rifle and pistol loads.
    most recently I've been getting my most accurate 1200fps 45 colt carbine loads using 20 grains under a 265 grain bullet from mp454640

  18. #18
    Moderator Emeritus


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    What is the difference in the two 4227's H & IMR?
    [The Montana Gianni] Front sight and squeeze

  19. #19
    Boolit Master
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    both the same as far as I know

  20. #20
    Boolit Grand Master Texas by God's Avatar
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    When Hodgdon bought IMR, they decided to keep IMR 4227 on the market because it out sold H4227- or so I read in a magazine at the time. A late friend preferred it in his 10-1/2 " Ruger SBH not because of the velocity but because of the year round consistency and accuracy.( the IMR version)
    I'd be over the moon with your powder score- congratulations!

    Sent from my SM-A716U using Tapatalk

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check