need to clean 300 blk subsonic?

[kohalajohn]

I looked around but could not really find this answer.

Do 300 Blackout subsonic rounds have enough whoosh through the barrel to keep the suppressor clean?

I know there's no lead issues as with rimfire, but I wonder about powder buildup with these gentle loads. What's been your experience?

Thanks.

[John A.]

subsonics can get pretty dirty in there.