Before I sold my AR, I ran about 600 rounds of it with no issues. It's a little dirty, but not much more than Remington (green box). Some people will tell you that steel cased ammo is hard on extractors, but for money I saved, I decided that I can replace th eextractor if needed. A friend of mine has run a few thousand rounds of it through his Bushy and hasn't broken his extractor yet.