Just looking for input here. I'm thinking of loading some quality 300 BLK rds to sell at around $450 per 1K on local forums and maybe some of the larger forums like this one. I'm very interested in doing this, but I'd like to see what grain people would like to use in this cartridge and if supersonic or subsonic would be more popular. Provided I get into this, I'd be using a chronograph and provide all the specs on the load, and test fire 3 of every 1K rds as a QA/QC practice. Any input is appreciated, thanks in advance!