Well, I believe with the full size APC9 Pro the trilug is machined into the barrel as one piece. So, it could be one ore more of a few factors. Ammo destabilizing, trilug not concentric to bore, trilug adpater misaligned in Wolfman, undersized/disintegrating baffles, or just maybe tolerance stacking. Is the Wolfman exhibiting this behavior with other hosts? DA has had a bit of trouble with KG Made, the current builder of the Wolfman/Sandman, but particularly the Sierra-5 for disintegrating baffles.