Protein Scales Protein Scales – Effective July 11, 2022 Spring Wheat: -.03 per 1/5 under 14 pro to 12 pro. +.02 per 1/5 over 14 pro to 15 pro. Winter Wheat: -.01 per 1/5 under 12 to 10 +.01 per 1/5 over 12 to 13