Can you shoot 00 buckshot in full choke shotgun barrel?

Each shotgun will perform a little differently but as a rule the answer is "yes" and in theory the result should be a little tighter pattern than with a larger choke at the same distance. However, one caveat to that answer is that the tighter choke may in some cases cause sufficient deformity of the lead pellets so as to disturb their flight enough to enlarge or distort the pattern, especially at longer distances.