Howdy, I ran into a rather interesting situation over the past few nights, I am hoping that someone with more knowledge than me can shed some light: -I zeroed my Pulsar Trail XP38 at 100 yards on 24 September (not using a QD mount). Shot a boar at 114 yards 27 September, it was a well-placed shot in the neck right where I aimed and dropped the animal without so much as a kick. -29 September I shot another boar at 48 yards...It was facing from my left to right, and when I squeezed off on it's neck, I hit it in the face.??? Had a pissed off boar charge me that I managed to kill with about 40 feet to spare. -2 October (this morning) I shot a sow at 47 yards. She was facing from my right to left this time (opposite the boar), and when I squeezed off while aiming at her neck...I dropped her in her tracks with an impact right behind her front shoulder. -When I initially zeroed the optic, it was ~5" right at 25 yards...and now I'm guessing my last two shots were ~10" right at 50 yards. It would appear that the optic returned to default zero. At least I can stop questioning my first shot on the boar from the other night. -The rifle/optic has in no way been dropped or hit on anything. -I have not been in any significant temperature changes during this time. I have been lurking in the precision rifle game for well over a decade, and shot many matches as well as deployed many times...I know how to mount an optic and use a rifle. A little internet research has shown that the Pulsar shift problem has occurred to more than just me. ***However, I am a thermal newby and have no clue what is going on here. I had the battery removed for ~24 hours at one point...would this cause the problem or default reset? Or do I need to cut my losses now and send it in for warranty before I'm back out in the pasture throwing dirt and cussing a storm? Any advice you can give me would be greatly appreciated.