I just want to know, if someone out there has, unfortunately accidentally tried this or purposely did, or just "knows"? Could a .458 SOCOM "chamber" in a .300AAC BO. or .223 Wylde and "fire"? Also, pretty sure the .300AAC could chamber in a 5.56 or .223 Wylde and fire... ...but not sure? Just because it is the "parent-case" for the Blackout...not sure if it would fit & fire? Anyone "know", for sure? And, would the .223/5.56 would chamber in a .300Blackout rifle or is it too long? Would it "fire"...shouldn't blow up anything in this case, the bullet is smaller than the bore? Would the .300AAC & .223/5.56 chamber & "fire" in a .458 SOCOM gun?