If she can only shoot 1/2 box of .410 it sounds as though your money would be wasted on a 28. If you go with a wood stock, it can be cut to any length to fit her, I not sure a synthetic can be cut very short if at all. I've seen a few women that found youth stocks to still be too long. Go with a Limbsaver recoil pad, these help with recoil as much as any I've tried. Weight or lack therof can be an issue with single shot shotguns, you might possibly be able to add some weight inside the butt stock to help her withstand recoil.....