Need a comparison between H4198 and IMR4198

markrsims · September 19, 2009, 07:48 PM

Like the title said, I'm looking for a comparison between H4198 and IMR4198. Are they compatible? I've got a lb. of IMR4198 for loading .458 Socom, and load data for various slugs featuring both powders, but I've also got some new Hornady 325 gr. slugs, and can only find load data for H4198.

rn22723 · September 19, 2009, 08:43 PM

The are not interchangeable!
IMR 4198 is made by a subsidary of General Dynamics in Canada.
H4198 is made by ADI in Austrailia.

Sarge · September 19, 2009, 09:03 PM

And IMR was purchased by Hodgdon's in 2003. Consequently the best resource at the OP's disposal is the telephone.

Contact Hodgdons regarding IMR data for your specific cartridge at 913-362-9455 and I wouldn't be at all surprised if someone there couldn't answer your questions as to how these two powders compare, while you have them on the phone.

Kudos to you for asking questions, instead of just substituting components.

September 19, 2009, 07:48 PM	#1
markrsims Junior Member Join Date: September 19, 2009 Posts: 8	Need a comparison between H4198 and IMR4198 Like the title said, I'm looking for a comparison between H4198 and IMR4198. Are they compatible? I've got a lb. of IMR4198 for loading .458 Socom, and load data for various slugs featuring both powders, but I've also got some new Hornady 325 gr. slugs, and can only find load data for H4198.

September 19, 2009, 09:03 PM	#3
Sarge Senior Member Join Date: May 12, 2002 Location: MO Posts: 5,495	And IMR was purchased by Hodgdon's in 2003. Consequently the best resource at the OP's disposal is the telephone. Contact Hodgdons regarding IMR data for your specific cartridge at 913-362-9455 and I wouldn't be at all surprised if someone there couldn't answer your questions as to how these two powders compare, while you have them on the phone. Kudos to you for asking questions, instead of just substituting components. __________________ People were smarter before the Internet, or imbeciles were harder to notice.

September 19, 2009, 08:43 PM	#2
rn22723 Junior member Join Date: December 10, 2001 Location: Burbs of Minneapolis Posts: 676	The are not interchangeable! IMR 4198 is made by a subsidary of General Dynamics in Canada. H4198 is made by ADI in Austrailia.