Took the new XD40 out this morning with a handful of Rainier 165gr FP's, mixed once fired and resized brass (mostly Remington & CCI) 7.2gr of Hogden HS-6 & CCI small pistol primers. Accuracy was awsome, cases & primer pockets looked perfect, barrel cleaned easily,...however,..roughly 4 times in 50 shots the action locked open on a loaded clip as if I where empty with no rhyme or reason,..could have had 5 shots remaining, could have had 10 shots remaining. Everything looked fine in the clip, the next round available with sitting perfectly in the magazine. Dropped the slide release as if it where a fresh mag & things went well for another handful of shots before doing it again. Is there something that needs adjustment with the load, the COL or is there a slight chance being a new XD it still had some packing grease in it & needed a complete cleaning? Maybe holding it a bit too loosly with the rear grip safety? Kinda curious & would hate to have to change the load with the accuracy I'm getting. Any pointers or similar experiences you might share are appreciated.