About nine years ago I inherited a Marlin 882 SS .22WMR (among others), but didn't take the time to shoot it until a few weeks ago, to shoot squirrels out of the peacock feeder (that gamebird feed is way too pricey to feed to tree rats). Twice out of maybe 12 shots I had trouble ejecting the spent case, and both times I found a split or rupture running almost the length of the case. Ammo is Winchester Super X. Bad ammo lot, or a more serious problem? I like the gun so far.