The cci 400 primers are good. You won’t get the same problem with 223 because you aren’t running subsonic. I would bet you don’t have the same problem running H110 and supers in 300blk suppressed. The common issue is subsonic suppressed. Every powder I have tried has the same basic problem. Extruded powders are the worst. Super gritty. It’s something you just have to live with and know is going to happen. It doesn’t mean something is wrong.