Whats the downfall of an open gas port in the barrel vs lead bullets? No issues?

I think cast .224 bullets are cool looking. But I doin't think I'd want to cast thousands of them. But maybe a gang mold would be ok.

We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....