I believe that yes, you can try more crimp -- but the amount of movement you observed isn't enough to concern me quite honestly. If the Ranier 335gr has a crimp groove and your 5th round was still in that groove, I wouldn't be quick to worry.
Myself, for the "bullet pull" test, I like to run twice -- so 8 rounds with that #5 round subjected to all the recoil.
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