The inner hard points were made to accept the 2K# bombs, however, several groups found it very desirable to make modifications to prevent the bombs from swaying and wobbling. There are a fair number of accounts of missions with 2K# bombs, but not a great number.
I cannot remember seeing any documented instances of 3K# bombs on the inner hard points, nor any of bombs, especially not 250# or 500# bombs, carried on the outer hard points where the rocket trees attach to a late J or an L. I'm not saying it never happened, I'm just saying I cannot remember seeing anything on it, and it's the sort of thing you'd remember.