I pressure canned my last big boar and the jar we ate first was pretty good! It wasn't tough at all. I'm not sure if that was just a jar of good parts or if the others are going to be good too.
I made a ham roast from a doe a few months ago and it was still tough in spite of being in the crock pot for hours. I took it out of that and put it in my pressure cooker for 45 minutes and it was tender! I can a lot of the venison as well and it's consistantly delicious.