Ive been looking at making an underquilt next and I was searching for down when I thought about hotels having down pillows. After some research I found out that a local hotel uses a down pillow with a 550 fill power down. I know that normally people go for 700 to 800 fill power but how much difference would it make on a 3/4 quilt. Im not a super light hiker but whatere I make will be lighter than the sleeping bag Im using now. Would the drwbacks outweigh the benefit of the 550 down possibly being free? Im about 5'9" and I havent decided on an actual lenght yet but I wont be doing much if any winter camping. I dont mind buying a 700 or 800 FP pillow from ebay or overstock but if I can get this for free and it will work I may have just found a way to mcgyver myself a cheap UQ.
Thanks for the input