^^ The Remington M24 cartridge made for issue with the Aircrew Survival Weapon .22LR/.410 was 40.5 gr FMJ with 2.5 gr smokeless powder.
Army Tech Manual TM9-1305-200 / Air Force Tech Order TO 11A13-1-101 June 1961
lists three types .22 LR in mitary service
.22 LR 40 gr lead, 1.7 gr smokeless, training, target round.
.22 LR 40 gr, commercial, 2.1 gr smokeless, training
.22 LR 40.5 gr gilding metal jacket, M24, 2.5 gr smokeless, air crew survival cartridge for issue in war zones, developed from the T42 round.
I suspect .22 Commercial is just the cheapest HVRN available. I remember seeing surplused cartons of .22 Remington Thunderbolt (lead roundnose high velocity) with National Guard labels as training ammo.
(Personally I suspect Eugene Stoner developed the AR-7 using the military issue M24 .22 LR loaded hotter than the usual .22LR high velocity.)