Sig and many other people have claimed WITHOUT PROOF that manually chambering a P365 will damage the extractor. I'm NOT a member of the Sig cult and I do NOT automatically take Sig's word as the gospel truth for anything, ESPECIALLY when they refuse to provide proof of their claims. Quite the contrary, I ALWAYS question authority. I plan to manually chamber the first round to avoid bullet setback problems. But in light of all of the claims that manually chambering a round can damage the extractor I needed to prove to myself that it was safe. I do not plan to actually allow the slide to slam the extractor over the the shell case rim, but its possible that I could lose my grip on the slide and it COULD slam the slide closed. I allowed the slide to slam the extractor over the shell case rim 1,830 times, after which it showed NO signs of damage whatsoever. That is the equivalent of manually chambering a round every day for 5 years. So if instead of easing the slide onto the round the slide slips out of my hand and slams the extractor over the shell case rim, I can be reasonably well assured that no damage will occur to the extractor. Furthermore, by polishing the leading beveled edge of the extractor, the friction reduction will make the extractor even less likely to be damaged while manually chambering a round. So I will manually insert a round into the chamber through the ejection port, ease the slide onto the round, then press the rear of the extractor inward which will pivot the extractor claw outward far enough to allow the extractor claw to pass over the shell case rim as the recoil spring draws the slide into battery, with NO chance of bullet setback. If someone wants to claim that manually chambering will damage a spring loaded pivoting extractor, then let's see your proof.