Hand sorting feathers out of down sounds easy but its actually a nightmare. Progress is incredibly slow and it turns you into a yeti. Watch those Ebay goose down products too-independant tests from the IDFL have found chicken feathers and cheap chinese immature down in lots of them. Not worth the effort IMO.
My advice is to buy from a reputable company-john lewis pillows have what they say in them and wont cost any more than anybody elses. Get new ones too, being stored for months compressed in fabric will damage the lofting abilities of the down. Feel the goods too-if you can feel lots of feathers, dont bother-they'll come straight through pertex.
Any good quality goose down over 600 fill should give you a very servicable quilt, but I'd want 700 or higher. A standard size pillow should yield 500-800g of down-enough for a 2 man tent full.
My advice is to buy from a reputable company-john lewis pillows have what they say in them and wont cost any more than anybody elses. Get new ones too, being stored for months compressed in fabric will damage the lofting abilities of the down. Feel the goods too-if you can feel lots of feathers, dont bother-they'll come straight through pertex.
Any good quality goose down over 600 fill should give you a very servicable quilt, but I'd want 700 or higher. A standard size pillow should yield 500-800g of down-enough for a 2 man tent full.