When racing I was working 3 shifts, so my training times changed EVERY week. When I retired my times were more consistent. Either way my losses TRAINING were very few. In my last 5 years racing I could count on one hand the number of young birds I lost training.
In my 50 years racing nearly all my losses were during actual racing.
The biggest mistake fanciers make when training YBs is letting ALL the birds go together. The larger the group you release, the less they learn. The smaller the group the more they have to think. More leading less following.
If you take 60 birds let them go in 3 different groups. In this age of BOP, the smaller your group, the less attention it will draw from BOP. If your birds are hit the chances are only one group will be hit.
Every year I hear of disastrous training tosses with YBs, and it's always the larger the group released the bigger the disaster.

