Crossbow training
6x9 room door on 6 side
channel out edge of room on non-door sides.
place archery targets oppisite door
place ammo stockpile along door wall
at top of door wall put QS:Ammo and beneath a Track stop feeding from larger stockpile
every so often go in and unforbid the spent arrows

To force them to train. Pick each and every target and set as an archery range. Make sure direction is correct. Don't worry about overlaps. Assign each ro "T" for the squad in question. Go to the schedule page. Create a training schedule with 1 minimum member no more. Create multiples of that not one single schedule with more than one minimum. Assign the schedule task to months they need to train.