I've seen a lot of variability in 177 Crosman domed, 10.5 grain. One tin shot great, fully equal to H&N in my P35-177. Next two tins shot poortly. I got a pellet gauge and checked head size. The "good" tin had much more consistent head size than the two "bad" tins. I have not had any trouble with the 14.3 grain 22 pellets, domed or "hollow point", in my Prod, however. They do not shoot quite as well as the copper plated H&N FTTs it really likes but they shoot well enough for most purposes.
I don't see how Crosman pellets will ever damage my guns, however. Even when they don't shoot well they work fine for testing moderators or to dirty a barrel after cleaning.