Molly's curse - something other than AK?

[jenanydot]

No: HPFGUIDX 173175

First of all, forgive me if this has been discussed already and I
missed it - I've tried to look through the list and find mention of
this specific point, but I haven't found anything yet.

When Molly defeats Bellatrix (which, by the way, is my new favorite
moment of the entire series - but I'm a huge fan of Molly's), we
aren't told specifically what curse she uses.  I've been having a
discussion about this with some of my coworkers, and no one seems to
be able to come to an agreement on it.  Some people are saying that
they believe she DID use Avada Kedavra, and that Rowling simply didn't
write the curse out because it was implied.  Others are arguing that
just because AK is The Killing Curse doesn't mean it's the ONLY curse
that can kill someone; things like where the curse hits on the body
could have a great deal to do with whether or not any particular curse
is fatal.

Personally, I think it's likely that Molly used some other powerful
curse to finish Bellatrix off.  I think that if she specifically used
Avada Kedavra, Rowling would have said so.  Also, it's stressed that
Molly's curse hits Bellatrix in the heart:

"Molly's curse soared beneath Bellatrix's outstretched arm and hit her
squarely in the chest, directly over her heart."

It seems to me that because Rowling is so specific as to WHERE the
curse hits, Molly may very well have used a different curse, one that
is only fatal if it hits a fatal mark.  The lack of any mention of a
green light, which has been so prevalent throughout the series
whenever a Killing Curse was used, also strikes me as odd if Molly
indeed used that particular curse.

It does say that both women were fighting to kill, but...I don't know,
it seems an odd picture in my mind to see them both standing there
throwing Avada Kedavra's at one another willy-nilly.  They're both
powerful witches; I'm sure a whole arsenal of curses were at their
disposal.

Does anyone else find my theories valid, or am I just reading too much
into the placement of the curse?

~Mandy