My score is 419 too.
To be honest, I am starting to loose hope about it.
Think about it, 13 draws so far, a total of 16025 invitations have been sent. The required score dropped to a minimum of 451 only once, yet, every 3 weeks or so, there are around 1500 new applications in the 460 + region.
In my opinion, there are at least 20,000 applications in the range of 420 to 450... which makes it almost impossible to get an ITA unless the CIC ups its invitations to more than 5000 per month.
anyway, guessing doesn't help, we just have to wait and see.