I've been shooting the Nosler J4/competition bulets for about 5 years now. Never had an accuracy problem with them at all, but I've had a box or two that had tunbling media/crud stuffed into the hollow points.
Talk about price hikes though. I refrained from buying any SMKs this year so far- .308 168s, 6.5mm 142s and even the 69 gr .224s are a little too rich for my blood lately.