I would recommend that you check alignment AND the inside of your rings first even if your rings are from a reputable maker.
I just got my Wheeler scope mounting kit... I installed the 2 alignment slugs and the alignment is very close...

I am mounting a Burris XTR 6X-24X-50mm onto Burris Tactical Rings...

The misalignment is so close that I am on the edge about lapping it...

Thanks