G2240. I had forgotten about that burn rate chart. Thanks for the reminder. I have printed it out, and put it in my reloading binder.
According to that chart, Ron H is right on the money. Each burn rate has a numerical designation according to it's burn rate.
W-231 = #23
Unique = #25
AA#5 = #34 (much slower)
AA#7 = #41 (very slow in comparison)
AA#9 is #45 is what I use for my heavier bullet, higher velocity .44 mag loads.
Even though it is closest to W-231, it appears that there is still a huge difference in pressure and burn rate. I tend to follow the guide lines very closely when building up loads.
I think I will keep this jug of Unique unopened, and maybe buy another just experiment with to add data to my binder. It does seem to be quite versatile.
I wish it wasn't so darn cold out today, as I have a bunch of test loads to chronograph. The really cold temperatures lower the velocities of some powders significantly. If I adjust loads that have been chronoed when it's cold, they end up being too heavy come summertime.
Thanks for all the info folks. I may see what this stuff does with the .38 special 147 grain LWCHB heads that I have on hand.
WG840
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