temp swings

[Melkid]

I have a pc combo and I an seeing big temp swings. I have 2 other pitboss with very little swing 820 and a tailgater. i thought the pc combo was to be a better smoker. If I set the temp for 350 it will go 362 and drop to337. The info put out about the pc combo it was to be controlled by PID loop which should be better than a P setting . any help would be Great
thanks
Mel