Originally Posted by Buford
'One can also understand "lock and load" as a meaningful instruction with the M1, as described in the manual: before loading the clip, the proper procedure is to lock back the bolt using the operating rod. Note that on page 21 of the below referenced manual the procedure for preparing the M1 Garand for firing is to "pull the operating rod handle to the rear until the bolt is securely LOCKED open". To load the clip without first locking the bolt could result in the bolt inadvertently expending a round, which could be lethal.'
I recall being instructed at Fort McClellan "When I give the command to 'lock and load' you will place a magazine in the magazine well, locking it into place. Then you will pull the charging handle fully to the rear and release, loading your weapon. "