Help with incubating Serama and Silkie eggs.

[BekahBear]

I have some shipped eggs in the incubator right now. Most are Serama and a couple are Silkie.
I am used to incubating standard chicken eggs. I do not have experience with hatching these bantam breeds, so I am hoping to find out from someone who does. The eggs are in a Nurture Right 360 incubator so they are being rolled by the turner instead of tilted if that matters.

I am reading conflicting information about when I should put them into lockdown.
They are on day 15 right now. I have read that the bantam breeds will sometimes hatch out a little early. Depending on the source, I have read that they should go into lockdown anywhere from day 15-18.

When is the best time to actually put these eggs on lockdown?

 

[Smileybans]

So I’ve hatched out silkies 3 times and every time they hatched out on day 21. Even my bantam Cochin didn’t hatch early. I’m glad I didn’t find that information when I was hatching my first set of silkies because I would have been worried too. I put all of mine into lockdown on day 18. Or the night of day 17 for some. I didn’t want to forget on day 18. None hatched out early or late. I had some die in shell with this last set but only this last one. And I still got a 70% hatch rate with that set.