Hello Jturpen,
Thank you for the question.
RadGridView does not have a limit for the columns that it can contain. However, you have to consider that the grid is designed to handle a huge number of rows not columns. So you should have in mind that hundreds columns in your RadGridView instance may slow the performance down.
If you have other questions, do not hesitate to contact me again.
Regards,
Martin Vasilev
the Telerik team