How do I tell which it is? I just picked up my Weatherby today and as I was fondling it before starting to get ready for bed I noticed a crack behind the tang. I have seen the finish on these Mark Vs crack in other places...but this is a tricky place... It does not appear to be a continuous crack, but given it's a .300 Weatherby, I want to be sure of what it is so I can do something to correct it before I take it out to the range or field.