Why did it cost less to ship my return back to MidwayUSA than MidwayUSA charged when they shipped my order?

There could be several reasons for this. The most common reasons are the UPS residential surcharge, delivery area surcharge and extended delivery surcharge. UPS charges a fee to deliver to a residential (home) address and extra fees to deliver to more remote addresses because they have more costs associated with these deliveries. If we shipped to your home and if your home is located in a remote area, these fees were included in your shipping rate. When you shipped your return back to us, you were shipping to a commercial address and were not charged the residential surcharge, delivery area surcharge or extended delivery surcharge. Other reasons could include package insurance, shipping method and carrier selection.