2016 started in the upper end of the 177 prefix, then rolled over into 178.
I don't have any 177's and my lowest 178 is in .22 LR at 178-41xxx and it is 2017. Also have a .44 Special from 2017 at 178-47xxx.
And I have 178's in .327 Fed and 10mm.
So I can't help, but if you have a caliber preference, you should probably mention it.