Mr. Chongo,
I am leaving town for a month, and heading to the east coast, visiting family in Virginia, friends in Massachusetts.
I don't have a 300 Blk Out, but its still not that hard to start figuring that out.
I'd take a look at the 30 Carbine first , especially in Cast Bullet manuals.
Start off with the 110 grain bulllet first... Compare that with the 300 AAC:
https://www.shootersreference.com/reloadingdata/300-aac-blackout/Find a powder that is within the burn rate of Blue Dot.
there is a bunch of load data with the 150 grainers also..
There should be something close in there... I know I saw Trail Boss load data.
start low and work up...
iI'll check in periodically if I can be of any assistance or advise.