njtinman,
You will get so many recommendations here that it will only tend to confuse you even more.
Since it is, (or rather you have), decided to use Promo powder. My suggestion is for you to call Alliant and ask for their current copy of Alliant's Reloaders Guide. This has a special section showing many loads for Promo powder.
Call 1-800-276-9337, and order your copy of the guide.
Additionally, since the load data for Red Dot is identical to Promo, (actual charge weights, not bushings), you can use any published data for Red Dot, and simply use the same weight of Promo, and be fine.
DLM
PS: Check for PM I sent.