Hi,
it is possible that some card
in particular HOLOs cards stick over time in the PSA case? Some cards can be shaken and some not or only with a bit of “force”. Any ideas or experience?
In my experience cards do NOT stick inside a PSA case, however they are given a bit of room to breath, which is typically a good thing. Cards that can shift up or down a tiny bit will not get damaged in any way even if you shake them. I think some members here have even done that to try and prove a point.
Overall, a PSA graded card is just fine and some movement should be expected and is a good thing. I doubt most of us start the day by shaking our cases up and down, so all is well.
Some are tighter then others. As JoeR Mentioned, the PSA cases are given room to breathe, so much that I have a PSA case that if you tilt it left or right, the card freely floats around as it clanks against the edges and makes a audible noise. Same with up and down motions. PSA 10*