I was looking for load data and found that on the msre forum as the first post describing what the 24 gpc is. The one who posted it stated
“The 24 GPC is a necked down 27 GPC with the shoulder pushed back and case shortened to optimize it to run up to 105 grain bullets.”
Also stated the trim length was 1.62… the 6.8spc and 6x6.8 trim length is 1.676…. I believe that’s 56 thousandths shorter. It is possible the information I saw was wrong though.
