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You say the one on the right is set up for correct head space, but the one canned heat ones look different? Do both of those chamber ok? If they do, then I'd have to guess that the canned heat is head spaced off of the case mouth instead of the shoulder which is totally different from what I've read.
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Yeah, the shoulder of both factory rounds (Speer and GA) is MUCH too far back. I don't remember now but it seems like their .05 or something longer in the neck than "book".
They chamber fine but..... if you drop them in the barrel when it is off the gun then they headspace on the mouth (or possibly the shoulder) but they are WELL below the barrel hood. When they are chambered in the gun the extractor pulls them back and they are not touching the mouth or shoulder, they're just hanging on the extractor. I've been told by several reputable sources that headspacing on the extractor is in fact the norm for factory auto pistol rounds, regardless of what is supposed to be.