Actually the Bomb Squad IS local Law Enforcement, that's what I do in NC, as for drilling into a Shell, well sorry pal not happening here, WAY to dangerous, that shell is in rough shape by the picture. We would X-ray it first to see if it has anything inside, then if it had to be rendered safe, I would use a linear charge on the extreme bottom to "Crack it" so all you would have to do is put it back, bondo and paint it, but when it comes to live ordnance like one of the other posters said, Black powder is a finicky thing, sometimes it gets more dangerous after time, and as for that pic, I'm sure that some moisture has gotten in there, and then dried making the powder even more sensitive. The only way to render it without cracking it would be to remove the fuse, but in that condition, I wouldn't do it.