WARNING! Lots of questions!
I am now working on my insulation and have found an old goose down sleeping bag (It has the older metal zipper, but the older, slightly thicker nylon/polyester(?) outer, but not the heavy canvas). Anyway, it's surprisingly heavy! Maybe even heavier than my 3lb 0˚C/10˚C synthetic bag (I don't have a scale of any kind, this was by feel), and it does not pack down very much - 6"x24"? and that's really shoving it in the bag.
Could it be the zipper (the plan was to get rid of it)? I was thinking of converting it to a top or bottom quilt, but I don't know what to do with it now. The woman who gave it to me doesn't know the temp rating, but suggests a vague "3 season" answer, and there's no tags to refer to, no name brand, nothing. Is the way to find out through trial and error? Cold it be a 4 season one?
Would the idea of using the down and stuffing it in my synthetic, which is a much softer nylon material, be a worthwhile idea? Could the weight just be the zipper and outer material combined? Did I just waste my time?
Did they start doing something different to down over the years to make it lighter and more compressible or something? Why is it so heavy?