Originally Posted by PatriceJ
because my time is very valuable. because no sewing machine can load a bobbin with as much as you'll get from a prewound. because winding bobbins is annoying. because i wanted to. because i could.
that's why.
i haven't needed to buy them in a while, but the prewounds i bought were only pennines more than the cost of an empty bobbin. it was good 100% cotton thread. overall, i think i came out waaaaaaaaaaaaaay ahead.
Ditto to all the above plus some bobbin winders just don't wind properly and are a PIA to fiddle with to get them to wind correctly. Also, once you have a quilt loaded on the frame and are buzzing right along--the last thing you want to do is run out of bobbin thread in the middle. Using the prewounds insures that you can make it through at least one pass and possibly 2 depending on how heavily quilted the pass is.