Hey Hoppy, although we do not actively stock 300 AAC Blackout, we deal with manufactures that can build to your needs. What type of round specs are you looking for (ie: bullet type, grain, subsonic, quantity, etc)? Feel free to send a PM and we can get back to you with a price quote.
EDIT: WE NOW STOCK 300 AAC BLACKOUT, CLICK HERE
TO VIEW OUR SELECTION.