I like Crosman pellets and if they shoot good in your gun then use them. The Crosmans are a little harder than some of the other pellets but still a lot softer than steel. If you are worried about them leading up your barrel try lubing them. I use Slick 50 One lube. I spray a little in an old cookie tin and roll the pellets in the oil. None gets in the skirts that way.
Bob in WV
Never get in a hurry, it only slows you down.