I bought some ammo that I got at a good deal in .556 and I have a Bushmaster Varminter .223. After checking Bushmaster's website, they say this:
So now I am thinking they are trying to have it both ways. They say it's safe, but don't do it. Do I need to either get rid of the ammo or go buy a .556?
All Bushmaster rifles are chambered to accept 5.56mm ammunition and always have been. The NATO Spec 5.56mm chambers have a longer "leade" or throat than the SAAMI Spec .223 caliber chambers which have about half of the leade or throat of the 5.56mm chambering. While it is safe to fire both 5.56mm and .223 caliber ammunition in our rifles, the 5.56mm ammunition should not be fired in rifles chambered in .223 caliber as they will develop very high pressures.
So now I am thinking they are trying to have it both ways. They say it's safe, but don't do it. Do I need to either get rid of the ammo or go buy a .556?