Shipping art prints in a tube?

[Toasty the Baker]

Hi all! This summer I will be selling off a lot of my collection, including selling off a lot of art prints. The are all mostly 18" x 24", so I will be rolling them in tubes.

My question is, how do you guys ship your art prints in tubes? My method is rolling the print and placing it in the middle of the tube so the open space on each end is equal. I then put wads of bubble wrap in the open space on either end to prevent the print from moving. This is my main concern, the print sliding around and banging up against the plastic end caps. Will bubble wrap wads on either end adequately prevent this? I packaged one for practice and shook the tube around a whole lot and it seemed that the print still crept up a little to the end cap. It didn't come all the way during my experiment, but I imagine it could during transit.

What advice do you guys have? Thank you!