Will I be able to get into IPU if Iam able to score around 260 out of 400 in IPU CET and Im from outside delhi region from General Category?

According to your score, your expected rank will be in the range 4000-5000. I will list down some college options for you in which you have good chances of getting a seat.
1. Trinity Institute of Professional Studies, New Delhi
2. Ideal Institute of Management and Technology and School of Law, Delhi
3. Institute of Information Technology and Management, Delhi
4. Rukmini Devi Institute of Advanced Studies, Delhi
5. Institute of Innovation in Technology and Management, Delhi

Check out the link below to explore more colleges for bba.

https://www.careers360.com/ipu-cet-college-predictor

Good Luck !