Interesting, but I don't think the grinding will help because that effect will be gone as soon as you drill past it. My guess is that the bit is going to jump like crazy, and might break. I just don't think you can get a clean through hole.
I think the best tool is not a drill bit, but a milling machine end mill. Here's one in 1.5mm - http://www.cuttingtoolsource.com/endmills_...ic_ballnose.htm
Here are some more - http://drillcity.stores.yahoo.net/endmills1.html
I'd call a couple of these places and try to find a 1.3mm end mill. Run that at a very slow speed on the press. I think that'll yield better results. I'm just guessing of course, but that's what I'd try.
Good luck!