Jimmy you could try a pre-soak if you aren't doing that already, and maybe a little more gentle agitation right at the beginning of development. ( I don't think that looks like bromide drag, but if it is then a little more agitation throughout the entire development?? )
I was just thinking of you today! I went out with my foamcore camera and was thinking about x-ray film. Is it possible to develop a lot of contrast? I'm aiming at salt prints and some homemade Printing-out paper...