Shooting today, I chronied my 90 gr Hornady XTP HP .380 loads at an average of 865 or so, using medium-charge weight of HP-38. OK Then the AR, Speer 55 gr fmj's with Varget at 3100. So far so good. But then the 9mm: 124 gr Hornady XTP HP's with medium charge weights of HP-38 were showing around 1950 FPS!!?? seems like about twice what they ought to be, but no high pressure signs and in fact they felt not like they were hot loads, but rather they felt like light loads.
What is going on? I'd assume the chrony is whacked, but the other ones were right where I expected them to be.