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Differential cross sections were measured for Pi(+) and Pi( - ) elastic scattering of Calcium 40 and Silicon 28 at incident pion energies ranging from 100 to 260 MeV at a scattering angle of 175 degs. Differential cross sections were also measured for Pi(+) and Pi( - ) inelastic scattering to the 2(+), 1.78 MeV, 4(+), 4.62 MeV, and 3( - ) 6.88 MeV states of 28Si at incident pion energies of 130, 180, and 226 MeV and scattering angles between 115 degs. and 175 degs. in 6 degs. increments. The data are compared to previously obtained forward angle data through 120 degs. and agree quite well. The data show a generally flat angular dependence for angles greater than 100 degs. Several theoretical codes are reviewed for their ability to predict large angle scattering. Coordinate-space and momentum-space models generally thought to be sufficient for predicting forward angle scattering have proved to be inappropriate for use at large angles. A new phenomenological delta-hole model, currently under modification, shows a greatly enhanced ability to predict scattering at back angles. Theses. (aw).