Ok...so I have 650 fill power and I have 800 fill power. Right now I'll be making 3 under quilts for us, 3/4 length, 3 season, my plans were with the 650 fill power on these UQ.

I don't want to use all of my 800 fill power because later on I'll be making us winter UQ. But, I'm curious as to what would happen if I mix some of the 800 fill power with the 650 fill power, will that help the 650 loft better and insulate better?

What would happen if I mixed the entire batch of both fill powers all together?

Or are both of these questions just silly and a waste of good 800 down?