
1) Fine tuning
Found on
https://www.crosswordclues.com/clue/zeroing
[trade] Zeroing refers to a controversial methodology used by the United States for calculating antidumping duties against foreign products. The foreign domestic price (FDP) of the product is compared with its U.S. import price (USIP) adjusted for transportation and handling costs. Under zeroing, the United States sets at zero the negative ...
Found on
http://en.wikipedia.org/wiki/Zeroing_(trade)

Time spent before the race shooting paper targets to align the rifle sights. When zeroed, the rifle is accurate for the particular wind and light conditions on the range at that time. Biathletes may also make adjustments to their sights during a race.
Found on
https://www.nbcolympics.com/news/biathlon-101-glossary
No exact match found.