I wasn't aware the M2 Carbine was in combat use in WWII. Just did a Quick Wikipedia check that indicates it was used at the tail end of WWII both in Europe and the final phases of the Philippines. If it was use in PI it must have been use on Okinawa.

Please post more info on your experience with your M2 Carbine, load development, function and any additional info you care to share. I collect and shoot WWII weapons. I have a Rockola and a Inland M1 Carbine. I've even shot out and replaced the barrel of the Inland.

Thank you for this interesting post.
Thank you and your dad for your service in times of war.