I use 777 for all 3 of my ML, and have had great success. When BH209 first came out I was interested, but could not find it for sale anywhere near me, I could have it shipped with the addition of a hazmat charge wich added $$. I dont mind swabbing between shots, never had a problem with the crud ring that a little elbow grease could not handel. As far as the barrel rusting, someone already posted this, thats your fault not the powder. I have nothing against BH209, never shot it. I like my 777, and the deer I have shot with it sure did'nt know the difference.