I may seem like I am picking nits, but the whole point of communication is to have a standard frame of meanings for the symbols. Journalists, as professional communicators, should take the time to actually learn what terms are, and what they mean, before they go off and invent new ones.
The assailent triggered the bomb from a bunker 330 feet away from the blast
You have to ask yourself, did the eye witnesses take a tape measure, or pace off the distance? No. They said "oh, it was about 100 meters" and the journalist duely ran the guestimate through a unit conversion. Really fellas, 100 yards would usually substitute well for 100 meters for most off the cuff estimates.
Or at the very least, lop off 30 from the estimate and go with a nice round "300 feet". You don't gain precision by changing the unit.
Perhaps I expect too much of the media, but how am I supposed to evaluate the veracity of the story if I can't tell where the reporter got it from? It would be one thing if these stories were major events that required years of investigative reporting. But nowadays you find Anonymous sources in stories that are little more than Gossip. With headlines like 'Special prosecuter MAY X' or 'Congressional Panel Considering Y'.
Let me break it down: when you hear 'Source who requested anonymity' it is one of 2 things: A political sock puppet OR Senator X's press secretary's hairdresser's boyfriend.
Caliber is the bore diameter in decimal-inches. You could theoretically refer to a gun with a wide barrel as large-caliber. From my time at aberdeen proving grounds, large caliber is generally a tank round.
Snipers use a range of bullet diameters, some of them up to 0.50 caliber. While that is large-caliber for a rifle, it is peanuts compared to an artillery piece. The also tend to use high-power ammunition to travel long distances.
So you can have high or low power and large or small caliber. But high-caliber is nonsense unless, perhaps, you are referring to the fine workmanship that went into it.
(Thank you to Brad Shephard who corrected an earlier misunderstanding of mine on the subject.)