If you have time to try something before sending it back, try scrubbing the heck out of the chamber area. The Seecamp has a "rough" chamber, that the brass expands into when fired, in order to slow down the slide in recoil (it is blowback operated, after all). If brass and carbon are allowed to build up (which can happen in relatively few rounds), these recesses cannot slow down the slide speed enough for proper function. I have had it happen with my 380 (after 50-75 rounds or so) and with my 32 (after several hundred rounds), during which time I thought I had cleaned the chamber well enough.
Also, use Silvertips, as they have a brass case, not nickel plated (I don't know if that matters, but it seems like it would, and Silvertips work better in mine).