If you have a concern play it safe. Contact the match director, or read their entry information, and get what they recommend. When I look at major matches they almost always have a couple brands that if you have new purchased ammo they will accept. If they don't have any designated brands, pick up a batch of name brand new (white box Winchester, UMC, MagTech, etc.) and avoid any possible issues.
I know it is too late for you for this weekend, but when I travel (fly) out of state to a match I order everything I need from Midway and have them ship it ahead to the motel I'm staying at.