MEC 751E Pro Check is for 600jr loaders.
It prevents accidental powder spillage (ensures only 1 charge per drop) by keeping the charge bar cycle in sequence. Also operates wad guide automatically for easier insertion of any length wad column.
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to – www.P65Warnings.ca.gov.