Has anyone else had the problem of the rims cracking off of A-Zoom snap caps? I purchased a set of .38 special snap caps back in December and so far two rims have completely cracked off, one is ready to go, and cracks are forming on the rest. I have had a set of 9mm snap caps for a year and those are fine. I can put up with one broken snap cap, but the whole 6 pack breaking? Does anyone have any experience with A-Zoom's customer service and possibly getting a replacement set?