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Thread: OOPS! I loaded IMR4227, NOT H4227!

  1. 01-19-2009, 08:29 PM #1
    GSPKurt
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    Unhappy OOPS! I loaded IMR4227, NOT H4227!

    I am working up a mid-range (~1500 fps) load with 260 gr. FPGC cast lead bullets in my Ruger SRH .454 Casull. I loaded 30.0 grains of IMR 4227 instead of Hodgdon 4227 . I am 10% under max as listed in the Lee manual. Do I need to pull 'em and start over?
    Kurt H.
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  2. 01-19-2009, 09:00 PM #2
    35remington
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    No.

    I have reason to believe the IMR 4227 in the round containers is really old H4227 Extreme, despite Hodgdon's marketing claims. Regardless, the burn rate isn't that different when I compared "old" H4227 to "new" IMR 4227.
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  3. 01-20-2009, 11:41 AM #3
    Wayne Smith
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    As long as you are in midrange level loads, no.
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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