I haven't fired this gun yet, but when I pull back the slide, it fails to load one in the chamber. The slide gets stuck all the way back and I have to push/force the slide to close. I've tried about six times with two different loads (one JHP, one FMJ). Is this something that will work its way out after firing normally? It should just work, shouldn't it? Would disassembly and a lube fix it? Thanks.