Powder compatibility approximation.

[daniel craig]

Found this chart from ADI World Class Powders.

http://www.adi-powders.com.au/powder-equivalents/

Edit: as many have pointed out, this is an appropriate grouping. Verify with manufacturers.

 

[cfullgraf]

Interesting list that can give on an idea of a powder that will provide a similar performance from another.

DO NOT ASSUME THEY ARE INTERCHANGABLR GRAIN FOR GRAIN!!!!!!!

Use reputable published data for the new powder that you are using for working up new loads.

 

[db_tanker]

what cfullgraff said...I'd verify from as many sources as are available before working up loads with this chart.

 

[BBarn]

Just a burning rate chart. Like the other charts, it simply groups powders with similar burning rates close together. Powders close together in the chart are often suitable for the same cartridges.

 

[rfwobbly]

Powders close together in the chart are often suitable for the same cartridges.

....but are NOT interchangeable grain for grain. Powder A may use 15gr to take a 150gr bullet to 1200fps, while the "equivalent" Powder B may do the same thing with only 10gr. Thus, 15gr of Powder B might be "Kaboom city".

 

[FROGO207]

Best to treat this as another piece of the puzzle. Use it to fine tune your collective load data and as a guide that if X is not available then look up the data of Y propellant to see if it also would work for your application.

 

[Bfh_auto]

They're groupings are OK most of the time. But the H4350/H414 is a blatant error.
I much prefer the IMR list that just numbers them in order without grouping them.
Then I use load data to find my choices.

 

[GeoDudeFlorida]

I recognized at least one flaw in the table right away. Unique is universal but Universal is not Unique.

 

[daniel craig]

Interesting list that can give on an idea of a powder that will provide a similar performance from another.

DO NOT ASSUME THEY ARE INTERCHANGABLR GRAIN FOR GRAIN!!!!!!!

Use reputable published data for the new powder that you are using for working up new loads.

I’d say that’s pretty obvious but it’s at least a place to start.

I’ve already emailed many of the manufacturers for their recommendations.

 

[Swampman]

Some of the ADI powders are the exact same powders as their Hodgdon equivalents.

ADI manufactures a lot of Hodgdon's powders.

Hodgdon Equivalents for ADI Product Codes

 

[Swampman]

I recognized at least one flaw in the table right away. Unique is universal but Universal is not Unique.

I looked at the table twice trying to spot the "flaw" and thinking you were crazy.

Then I finally got it!

It felt good when I figured out that neither one of us was senile...

 

[cfullgraf]

I’d say that’s pretty obvious but it’s at least a place to start.

It may be obvious to a veteran reloader that the powders are not interchangable grain for grain but not necessarily to a novice.

I’ve already emailed many of the manufacturers for their recommendations.

That should provide appropriate load data. The main line powder manufacturers have a presence on the internet with their data.

 

[Hondo 60]

Edit: as many have pointed out, this is an appropriate grouping. Verify with manufacturers.

PLEASE BE CAREFUL!

5 grains of P50N IS NOT the same as 5 grains of HP 38 or PB or W231
Using appropriate amounts of each powder can have similar results

 

[Virginia Jim]

H4227 / H110 IMR4227 W296
Disagree

 

[cfullgraf]

H4227 / H110 IMR4227 W296
Disagree

At least with H110 and W296 and W231 and HP38, Hodgdon has announced that they are the same powder. If you look at current load data, from Hodgdon, the data is the same.

There is at least one pair of Accurate/Western powders that are the same that I know of. I'm sure there are few others.

The point is, do not assume they are the same unless you have reputable information confirming two different powders are actually the same. If reputable information is not found or you are not comfortable with what you find, find reputable data to use for developing your load.

 

[mdi]

Yep, I read "powder equivalent" not "powder interchangeability". A reloading manual is for load data and reloading texts/charts are for general information...

 

[Bfh_auto]

Yep, I read "powder equivalent" not "powder interchangeability". A reloading manual is for load data and reloading texts/charts are for general information...

That's were the problem lies. Equivalent by definition means equal to.
Newer people may or may not understand the issue.
Powders that give equivalent Velocities would be a better descriptor.
Or similar powders

 

[Walkalong]

Powder burn rate charts are from "closed bomb" tests, and in the real world where a powder falls on the burn rate chart can change from one caliber to another.

Burn rate charts are an approximation and if you have a powder that is working well it can give you a suggestion of what other powder might work well too.

Follow published load data from trusted sources.

 

[mdi]

"Equal to" does not mean "exact duplicate"...

FWIW; part of my Rule #1 and my suggestion to new reloaders is to ignore any load data/powder charges they see on any forum...