404 chain - who is using it?

Same cutter, different angles
RS 404

 

404 Skip Chisel, my "go to" chain for my oldies.

 

I recently bought a 20“ hardnose and i tried some Stihl 404 RM on it.
After 6 tanks it still cuts amazingly well.
And i cut some Wood with alot dirt inside

 

Some old Mac chain