## Primers And Subsonic Ammo This turned out to Not be a primer problem at all - but more of a "build" problem with the gun powder. Add a little bit of cotton to your subsonic ammo if you are experiencing "Hang Fires" or "FTF's". [https://www.evernote.com/shard/s378/s](https://www.evernote.com/shard/s378/s)... We are experimenting with Gordon's Reloading Tool to calculate the amount of gun powder to add to 223/556 and 300 Blackout. [https://www.evernote.com/shard/s378/s](https://www.evernote.com/shard/s378/s)... Notes to get Started with Primer Reloading: [https://www.evernote.com/shard/s378/s](https://www.evernote.com/shard/s378/s)...