I use Roxanne needles, too. I had problems with needles bending and I even broke a few. Rosanne's do seem stronger and there are a lot in that little bottle.
I've also learned to relax my grip a little when hand quilting. It was hard on the needles but also my hands. And, I let the sandwich be pretty loose, not taut. When I first started hand quilting I thought I should have it tighter but not so. Softer, thinner batting helps, too. I use an old floor frame for my hand quilting and thread up a bunch of needles before I start.