From 12 to 30 shots, clean after each 3 shots. From 31 to 50 shots, clean after each 5 shots. Clean thoroughly with a high quality bore cleaner every 10 shots until 100 shots. This time-consuming process will allow the barrel to smooth out without an accumulation of copper fouling in the pores of the steel. The barrel should thereafter be cleaned every 20 rounds for best match accuracy.
Accuracy continues to improve for several hundred rounds as the rifle breaks in.
ArmaLite recommends the use of Black Hills moly coated .223 Win Match ammunition for both break-in and competition. We believe that Black Hills moly coated ammunition reduces the break in period by half and lengthens the period between cleaning in matches. Black Hills brand ammunition.