I bought some IMR TrailBoss today on the advice of my addiction feeding street corner powder dealer (damn the pusher man!)

Anyway, I wondered where on the burn rate chart it fits. I will be using this for 45 colt 200gr cast loads.

Check the Hodgdon site, it shows you what you are looking for:

http://www.hodgdon.com/data/general/burnratechart.php

Good luck and safe shooting!

Sunset

Thanks, I completely forgot about their website.