H4198 vs. IMR 4198?

[Sgt. 0811]

I've used IMR 4198 before for loading .223 but I can't find it.
Can I substitute with H4198?

 

[Queequeg]

Re: H4198 vs. IMR 4198?

They are sequential in burn rate on the 2009 Hodgdon chart; close but not identical. Short answer is yes, but load according to Hodgdon's suggestions.

Example;

63 gr SIE SP Min Max
IMR 4198 18.5 gr - 20 gr
H4198 18 - 20

 

[Sgt. 0811]

Re: H4198 vs. IMR 4198?

gotcha... thank you

 

[bigwheeler]

Re: H4198 vs. IMR 4198?

The imr is good for reduced loads, the hogdon isn't. So follow each powders
instructions, they are different.