I only use size 12 needles, but that's a personal preference. 14 is okay, too. Your 10 is for delicate fabrics like sheers and silks. Is it a universal or a sharp? A universal has a slightly rounded tip for sliding between the fibers on knits. Schmetz makes a quilting needle, but I didn't find any difference when I tried one rather than my inexpensive ones. I change my needle for every project. Take the needle out and gently poke a finger, then do the same with a new one. If you feel the difference, change the needle. You can try poking it through some closely woven fabric, too. If there's any resistance, change the needle. A dull needle pushes the batting around rather than piercing through the fibers.