Changing the protein calibration for hard red spring (HRS) wheat has minimal effects on producers' income. The new protein calibration, which was implemented on January 24, 1994, yields a 0.16-percentage point higher protein content for the 1993 HRS wheat. However, protein premiums would decline for major producing States as a result of an increase in the perceived supply of wheat protein. On a per-bushel basis, wheat producers gain an additional $0.15 due to an increase in protein content. This gain, however, would be offset by an equal amount of loss due to a decline in protein premiums.