.223 WSSM

There was an issue with severe throat erosion when the round first came out. I'm not sure if it has been dealt with or you have to deal with short barrel life.
 
There was an issue with severe throat erosion when the round first came out. I'm not sure if it has been dealt with or you have to deal with short barrel life.

That's not surprising considering the round looks like a film can necked down to .223.
 
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