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Old May 16, 2002, 08:07 AM   #1
Byron Adams
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4227

Are IMR 4227 and H4227 interchangeable? I will be loading a 22 Hornet 45 grain Sierra and stay at factory velocities. If interchangeable, was the H4227 manufactured in Scotland the same burning rate as the current H4227.
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Old May 16, 2002, 10:44 AM   #2
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No! They are not interchangeable. Although they are very close in burn rate, the IMR is slighlt faster. The pressures are considerably different for the same load.
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Old May 17, 2002, 05:59 AM   #3
Khornet
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Same question for

4895? IMR vs H?
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Old May 17, 2002, 05:12 PM   #4
MADISON
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4227

The 4227 powders are NOT INTERCHANGABLE!
In .22 Hornet my loads [for 45 gr bullets] are:
11.3 grains
11.5 grains
7.3 grains
My current load is 9.7 grains [Over Max in some books] but shoots a little over 1/4 inch at 100 yards.
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Old May 21, 2002, 06:40 PM   #5
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I apprecite the information. I settled on IMR 4227 and 11.3 grains. At 75 yards, the groups were about 3/4".
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Old May 25, 2002, 07:33 PM   #6
Abe Normal
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Khornet,
"4895? IMR vs H"?

NO they are not the same! Below is a burn rate chart.

BL-C(2)
HODGDON

2460
ACCURATE

H 355
HODGDON

H 4895
HODGDON

RELOADER 12
HECRULES

IMR 4895
DU PONT

IMR 4064
DU PONT

N 135
VIHTAVUORI

4065
BRIGADIER

2520
ACCURATE

IMR 4320
DU PONT

THE DATA BELOW SHOW MAX LOADS, DO NOT EXCEED THESE AMOUNTS, ACCORDING TO THE POWDER MANUFACTURERS!

From the Hogden web sight, for 30-06.
http://www.hodgdon.com/data/rifle/index.htm

H4895 47.5 grains 165 GR. SIE SPBT 2782 FPS 49,000 CUP

From the IMR web sight for the same bullet in 30-06.
http://www.imrpowder.com/rifle/new01...sp_3_data.html

IMR 4895 46.0 grains 165 GR. SIE SPBT 2700 FPS 57000 CUP
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