maybe you still haven't found the right pellet. I've heard that some 392s had oversized bores. maybe try some Eun Jin pellets, I think they are pretty fat.
yeah, I wish I had bought more of them when I had the chance. check out these "RWS" pellets. if you look, you can see the green EunJin label under the yellow RWS sticker. I just measured some and the EunJin definitely have larger skirt diameters than do Crosman Premiers.