This study has examined balanced and unbalanced polyampholyte hydrogel swelling transitions as a function of total polymer ion and bath salt concentration. The total polymer ion concentration ranged from 0 to 1.4 M and the bath salt concentration from 1 mu M to 1 M. Polyampholyte swelling transitions were studied experimentally using hydrogels with varying proportions of acryl-amido methyl propylsulfonic acid (AMPS-H), methacryl-amido propyl trimethyl ammonium chloride (MAPTA-Cl), and dimethyl acrylamide (DMAAm). The equilibrium swelling has been treated analytically using a modified Flory-Huggins model with ionic corrections which incorporate ion excluded volume effects. We have obtained qualitative agreement between our theory and experimental results and have discussed the limitations of our model.