I have had mixed results concerning Brown Bear. I am not one who is afraid to clean my weapon so all the talk about it being to dirty is a load of horse hokey in my opinion. I shoot a AR-10A4 (.308) and it feeds in and out just fine (for the most part) out of about 800 rds that i have fired i have had 2 or 3 rds mis function, primers would fall out or the steel would not extract properly do to swelling from gases and seizing in the breech. Now for the most part i don't mind the ammo since i'm the one paying for it, but with that said it would not be my first choice to go to combat with. Weapon systems such as the AR's have inherent problems to begin with, but they can be made much worse by sub par ammunition. I have about 2000 rds stock piled of Brown Bear but I would not take it to combat unless its my last option. It shoots straight feeds relatively well and stores for a good long while so in conclusion, great stock ammo for the OH **** scenario but if you can acquire better do so.