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.

"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC

“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez