Supposedly someone accidentally chambered a .300 BLK round and had a KB. What do you all think?
I can tell you that once I found a single .300 BLK round mixed in with my department’s ammo can full of training .223. It was one round and no one else I work with had even heard of .300 BLK at that point so it must have been a mistake at the manufacturer level. If this is really possible I’m glad I happened to catch it. I had previously thought that the worst that could happen was a fail to feed.
It’s a real safety concern. The .30 bullet can be pushed back into the case when it hits the neck of the 5.56/223 chamber. The case can then be chambered enough to allow a firing pin strike on the primer.
A search will provide more info., since this issue isn’t new.
Interesting. It’s the first I’ve heard of it, but I don’t reload or shoot .300 BLK. The post just stood out to me because I remembered that odd one round experience and was curious about just how possible this would be.
In our case it could have easily happened. It was a night qualifier and the only rifle ammo the department ever buys is American Eagle .223 and Hornady TAP .223. The AE gets dumped into an ammo can and brought to the range so guys basically just end up blindly loading their mags from the .223 can. I just happened to notice something weird looking.
That’s a good lesson that everyone here could take something from… Not just for this specific risk. But watching the ammo you load in your mag is your last chance at catching any number of problems/defects.
I reload 300 BLK and 5.56 and take them to the range together. I keep them in separate, different color and labeled ammo boxes. My 300 mags are 20 round smoke Lancers and my 5.56 mags are 30 round black Pmags. The final check is looking at each round as I load it into the mag. Definitely not fail safe and just like reloading itself, you have to pay constant attention to what you’re doing and don’t get distracted.