I applied for the CO card in late Feb and was approved. I went ahead and applied for the BA card knowing there was a chance of being denied. I was prepared to call Chase and request moving some credit from the CO card to allow the BA card to be approved. It wasn't needed and I was approved without any effort for the BA card. My applications were about 6 weeks apart. I say go for it, just be prepared to make a phone call if needed. (I say this with the assumption your credit is good.)