If your getting stove pipes its not a head space problem. Most likely an extractor problem or a recoil spring being too weak. Make sure the extractor is clean and no build up under the lip of the extractor and that they are not chipped or broken. If clean and OK then lube the extractor plunger and spring. A bit of grease on any surface something slides on along with a clean chamber. Make sure the recoil springs are about 10 and 1/4 inches long. If not and they are short replace them.
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