No experience with the Critical Duty ammo line, but if that is the same material as used in the FlexTip line of bullets I'm not a fan! I understand it is more of a wide meplat vs. the pointed FlexTip version, so there could be an advantage. . .I don't know. The FlexTip bullets in .44, .35 and .30 calibers did not impress me with on-game performance. . .pretty accurate though. Give them a try and let us know how they do.