Most times if the QLA is not concentric to the bore conicals won't shoot to great. I have not heard or seen a cupped bullet like the FPB or thor not shoot good groups from a TC with QLA.Others conicals sometimes key hole but the cupped bullets or skirt ones seem to shoot good most of the time.

Glad the removal worked out good for you with the FPB . I have shot a few deer with the 350 gr and all were dead deer down.
Steve