Taking chances is well worth the effort when I first started metal detecting which was years ago I used to own a bounty hunter I wasn't metal detecting the way I should have I always relied on target ID and the sounds I never took chances but it's different now I take chances all the time now
What did the person that checked it out, have to say about the "pin holes" in the specimen? I have never encountered a meteorite with pin holes in its surface.
I have heard that the best places to look for meteorites are in the Artic or Antartica. This is due to the dark meteorites are easy to spot on the ice. Have any ice in Nova Scotia? If not get a boat ticket to the Artic ice fields. You are not too far from them.
Of course here in Atlanta searching parking lots in metro Atlanta is an option since that is what covers most of our open spaces.
Sorry, I don't believe that is a meteorite either. I would say get it looked at by someone else because whoever looked at it the first time is probably wrong.