IMR 4064 v. AA 4064?

[Nevada Mike]

Loading for the .404 Jeffery and .375 H&H, I have several powders (IMR 4350, N-150, Hybrid 100, etc.), but would like to try 4064. Have loads for IMR 4064 but the only 4064 I can find is Accurate 4064, so I bought a couple pounds to experiment with.

What I would like to know is... can I use starting loads from the IMR4064 loads as a reasonable starting point for my loading? Is the AA4964 faster/slower/more temperature sensitive?

Your advice apprecaited.

 

[Wyatt Smith]

I am interested also as I just bought an 8 pound jug of AA4064.
On the burn rate chart, only Norma 202 is between them with AA4064 being the slower one.

 

[Joker12]

Yes, as starting loads. With proper workup you will be fine doing that. The 2 are very close to being the same. The AA4064 is a bit shorter grained and should meter better in your powder measure.

 

[sestoppelman]

Same here, got 2 lbs of the AA as Midway didnt have the IMR. Then a day later they had both, but now just the AA again so will give it a go. Everything I see indicates its just a tad slower than IMR.

 

[Nevada Mike]

Great! Many thanks!

 

[Shootist43]

Nevada Mike, some of your questions can be found on a good burning Rate Chart. There are several, below is a link to the one I use most often.

http://allthehowards.com/pistol/powder/burn_rate_charts/Powder Burn Rate Chart.pdf

 

[sestoppelman]

Rurn rates vary widely from chart to chart. I use several and try to average them out when comparing powders.
One thing to remember is that a powders burning rate is not constant, it will change depending on the specific application.
The chart above shows both the 4064's on the same line, while all the other charts I have show the AA to be a bit slower than IMR.

 

[Shootist43]

Nevada Mike, what sestoppleman said is true, I use several like I said. The link I showed you is used for quick comparisons only. Burning rate charts are not to be used by themselves for load development, but rather as a starting point for comparing different powders.

 

[Nevada Mike]

Shootist43

Thanks for posting the link to the powder chart... it lists many powders that I don't see on others. I printed a copy and put it in the front of my loading binder.

Mike

 

[7x57Joe]

My Accurate 4064 is a bit slower than my IMR-4064 paired with 150 grain bullets out of a .30'06.

 

[Nevada Mike]

My Accurate 4064 is a bit slower than my IMR-4064 paired with 150 grain bullets out of a .30'06.

Do you mean less velocity when comparing the same amount of both powders, or that the BURN is slower?

 

[7x57Joe]

Less velocity on the order of 180 fps but, may be different with different lots, components, and etc.

 

[Nevada Mike]

Thanks!

 

[F. Vaccaro]

Have you gone to AAs web & looked for their data? I’d be very careful exterpolating data.
Good shooting