Here are a few of my personal thoughts on the subject (I have considered making this cross or a similar cross on and off for a while) you have to look at it from both sides of the coin:
1) a jagd will grow to 25-30lbs MAYBE 35lbs, at least i've never seen or heard of one much bigger, one good thing to consider is that Jagd's are a relatively newer breed to hit the US and hog hunting world.........they as a breed have not been watered down to bad yet, so performance/standards/conformation won't be as broken down as the pitbull.
2) pitbulls some in just about every shape color and size imaginable.........this is where the real work in finding a suitable dog worth making the cross will come into play.
If......and it's a BIG if, I were to decide to make the cross for myself I would look for a pitbull that was taller than most and leggy with a good streamline body, tight flank and good strong jaw. I would not breed to a gyp the size and build of my current pitbull because I believe that I would be doing nothing more than watering down the jagd blood and making a buncha ugly short stocky long haired blue/black mutts with a severe little man complex lol.
An ideal candidate (in my eyes) to breed to one of my males would look alot like voodoo,the gyp that I bought from you last year Beau, If josh see's this post maybe he can throw a picture up of her, last time I saw her she was built close to the description I have above. 1 thing I would change (and she may have filled in/grew more since last time I saw her) would be that I would try to find a gyp a couple inches taller than she is. I would essentially be trying to breed a taller leggier jagd with a bit more muscle and not trying to make a shorter goofy lookin "bully" type pitbull.......if I want one of them all I gotta do is role through the hood in htown hahaha

. I would want a dog that would grow to 50-60lbs that when run in a pack could put the E-brake to the floor on a runner.