Ok so Stec 60-2 autopilot, 530 non Wass , King Hsi. I notice while being vectored to final on the ILS with autopilot engaged to intercept the ILS it blows through final then overcompensates to get back on course and weaves back and forth before settling down. I'm thinking a few things. I've been flying at 120 mph before it turns final. Too fast? On some approaches its about a 70 degree turn to intercept final. Being it's an ILS there is no Garmin style anticipate turn to final. I'm thinking the autopilot can't keep up with the closure rate. At a 70 degree heading change that should be roughly 24 seconds. Thoughts? Does this even make sense?