what is the difference between IMR and H powers?

[fastford]

are they the same?

 

[500grains]

Re: what is the difference between IMR and H powers?

Some are, some aren't. Please use data specific to the powder you are using. So use IMR4895 data if loading IMR4895. Don't substitute H4895. etc.

 

[500grains]

Re: what is the difference between IMR and H powers?

Also, the Accurate Arms powders use similar designations but are not the same. Example, AA 4064 vs. IMR 4064.

 

[Victor N TN]

Re: what is the difference between IMR and H powers?

Supposedly at some point in the future they may merge to one powder per number. Since Hogdens bought the IMR name I have heard many rumors that it may happen some day. As far as officially, I haven't seen anything from Hogdens. I frequent several handloading forums. I would think someone would post that kind of information if it did come out. But that doesn't really mean anything.

But for now be sure to use the proper data per load.

 

[fastford]

Re: what is the difference between IMR and H powers?

thanks guys!