Art of Marksmanship

This quest has a broken translation as of the 15 March 2023 patch
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After asking Dan why he only has buckshot and birdshot ammo for exchange, he answers that there's no demand for other kinds despite his attempts to advertise them, and offers you a promotion job for them. You have to kill a certain amount of targets at the specified minimum distance, with different kinds of slugs and flechettes.
== Walkthrough ==
The objectives are, as they appear in your PDA:
* Eliminate 50 NPCs with 12x76 Slug at 50m+
* Eliminate 50 NPCs with 12x76 Flechette at 75m+
* Eliminate 50 NPCs with .410/73 Magnum Bullet at 75m+
* Kill 50 mutants with 12x76 Slug at 50m+
* Kill 50 mutants with 12x76 Flechette at 75m+
* Kill 50 mutants with .410/73 Magnum Bullet at 50m+
Good places to kill stalkers:
*Bandit base in the ATP
*Southern military checkpoint in the Cordon
*Mercenary farmstead and checkpoint in the Army Warehouses
*Military base at Agroprom
Every time you kill a target with the eligible ammo from the proper distance, you'll see a message with the counter.
After completing all objectives, report to Dan.
== Notes ==
* It is recommended to use shotguns that have an included scope (i.e., TOZ-34 "Hunter" from Hunter's chain quest) or shotguns that can attach a scope (i.e., Vepr-12 "Sniper" from completing Duel of the giants).
* Zombified stalkers are usually the easiest targets for "Kill x amount of targets using y" quests, as they do not go to cover and walk slowly.
** However, Monolithians are the hardest, due to them not flinching and being tanky.
== Bugs ==
* Large mutants such as Librarians tend to count as two or even three kills, inconsistently; same for killing several mutants in a row. This is likely an engine-related issue.
* You can shoot at a mutant corpse to increase the mutant count kills, as long as you are far enough to count as a "kill". 
** Here is a video showing the exact exploit.