Thread: 300BLK cas thickness problems

From what I have read because the brass is thicker in the body of the 223 brass when it is resized to blackout dimensions it creates a neck that is potentially too thick. Neck turning(skimming the outside of the neck with a "mini lathe") should solve this but take care not to reduce the neck thickness too much as with semi fire the bullet can get seated back too far with recoil if the neck tension is minimal. Cheers.