I haven't got the warm fuzzies about MidWay USA backorders. In my case (several BOs of different 22 rimfire) they start with a shipping date and keep moving that date further out. Finally they say "overdue" instead of a shipping date.
To me "Overdue" means they are expecting it at any moment.
However, if you put the "overdue" product into a shopping cart; you will find the expected shipping date magically re-appears --- except now instead of say March, it's the end of June.
22 ammo is manufactured according to a schedule. If WW says they'll deliver in January, I think they probably did what they said they would do. MidWay, however, probably gets only a fraction of what it needs to fill BOs, so just sticks up a new, farther out, shipping date, hoping it'll get more from WW by that time.
I seriously doubt the WW or Federal or CCI doesn't deliver what and when it says it will ---- It's a manufacturer and unless un-avoidable delays come up (the factory burns down, the Guvmt says "Make 40 S&W instead of 22 LR) there's no reason to believe that WW's schedule of shipment isn't kept to a major customer like MidWay USA.
Me, I haven't gotten a single back-ordered round!! I use 2000 rounds or more every Spring (Richardson's Ground Squirrels).