Ive never seen a walmart that allows 6 boxes to be purchased in one day. The ones in the Indy area all have 3 box limits, dont they?
I was at the one in Fishers earlier this week and they now have a 3 box total, but 1 per caliber limit. So you can buy a box of 9, a box of 40 and a box of 45, but again only one of each. The other Walmarts I have been into don't have the 1 per caliber, so it seems some make up their own rules.