Last time I was in a firing range, I shot 250 rounds M4 M855A1 munition, I score a hit of 204 and 180 of those are kill shot.
Last time I was in war, I fired over 10,000 to 12,000 round, (About that much, maybe more, did not count them out exactly) with my 23 months deployment in Iraq and Afghanistan. If I go on to the figure I trained with, I should have killed between 7000-8000 Iraqi insurgent and Taliban, however, I only ever killed 6 confirmed (7 if you count the one I did not bother to check.)
If only war fought by the stuff you train with. To us, the actual people who were fighting in war, there is a gap between what you trained for and what's happening in reality. To most other people, for them reality does not exist. You look at some data, some test, some exercise, and instantly you have become an expert in that field.
I am not going to discuss how "useful" DF-21D was, it's mechanism and kill chain have been discussed to death here, not hard to find a discussion on DF-21D. Just one thing tho. If you are talking about killing a Carrier with a missile. Well, I will say, if the carrier have to get within your missile range, then it deserved to be dead. They are
AIRCRAFT carrier, emphasis on the aircraft part. You can literally launch them anywhere you want, you can launch them on mission to Asia in pearl harbor if you want and using mid-air refuelling to extend your flight group range.
@gambit @Hamartia Antidote @C130 @Desertfalcon