reloading noob question regarding powder
- Thread starter 2legit
- Start date
Yes, they have slightly different burn rates. - dan
OP, these folks are giving you good advice.
Go online and look up loads, from the powder manufacturer by the appropriate designation "IMR" or "H" prefix.
IMR powders tend to be a bit faster than their H or Hogdon counterparts.
Some folks feel that starting loads for the IMR powder can be used for both powders.
It really gets confusing now, because Hogdon's now owns and distributes IMR powders.
Normally, starting and mid table loads would be safe in intermediate size cases. Not so with the smaller cases, such as the 5.56/223, where a small difference can lead to much higher pressures.
Seeing as your WK is a semi auto, even more care is warranted.
Go online and look up loads, from the powder manufacturer by the appropriate designation "IMR" or "H" prefix.
IMR powders tend to be a bit faster than their H or Hogdon counterparts.
Some folks feel that starting loads for the IMR powder can be used for both powders.
It really gets confusing now, because Hogdon's now owns and distributes IMR powders.
Normally, starting and mid table loads would be safe in intermediate size cases. Not so with the smaller cases, such as the 5.56/223, where a small difference can lead to much higher pressures.
Seeing as your WK is a semi auto, even more care is warranted.
Google is your friend.
This is great forum but IF you search your cartridge, bullet combo you will get a mountain of info on best powders and loads.
I have found the Nosler data to be extremely valuable at finding "pet" loads.
https://www.google.com/search?q=pow...d=chrome-mobile&ie=UTF-8#imgrc=GPljQcAvvakHPM
This is great forum but IF you search your cartridge, bullet combo you will get a mountain of info on best powders and loads.
I have found the Nosler data to be extremely valuable at finding "pet" loads.
https://www.google.com/search?q=pow...d=chrome-mobile&ie=UTF-8#imgrc=GPljQcAvvakHPM
One caution. Never use a burn rate chart as if it was gospel.
Powders do act differently in different chamberings.
Plus the charts have errors in them as well. Look up data for
the powder you intend to use and work up carefully. Dave.
Powders do act differently in different chamberings.
Plus the charts have errors in them as well. Look up data for
the powder you intend to use and work up carefully. Dave.
So what's the deal with these powders with the same name anyways? Is there a reason why the manufacturers used the same number when naming their powders? I have noticed that it seems specific to IMR and H, the other brands seem to use different naming conventions?
Accurate also uses some numbers the same as imr.
IMR was first with 4198 and 4895, they were the well known gold standard. Hodgdon copied the IMR designations, probably to capitalize on the name recognition. In other words- marketing.
A lot of powders with similar numbers sold by different companies that are close to the same burn speed but are far enough apart you can’t use the same data for them. H 4350 , IMR 4350 and Accurate 4350 have similar application but different minimum and maximums. More examples are out there so always clearly identify the powder and make sure it matches the data you are using.
