I have not found it so dusty. As a habit I scoop and sift gently. I think the finest grade from Petco is a little finer than that from other sources. You could try the slightly larger pellets, too.
Okocat is apparently the number one litter in Europe. After getting bugs from Swheatscoop I switched to clay. It was very heavy to handle, my cat ate the dark little bits in it, and plumbing beware. Okocat is perfect in every way except tracking. I’m just dealing with that, since it’s so great...