DataGrid horizontal scroll speed

Hey everyone. I am building an app and have a datagrid with about 100 items in it. If you pick up the slider and move it up and down it moves all fast and nice. But if you click the down arrow or up arrow in the datagrid in moves in tiny tiny amounts.

My question…does anyone know of a way to increase those amounts?

Thanks
Rob

(let me know if you need to see what I am talking about)