When you attack a fort you then can't train for 4 hours just like when you shoot a BG or MIA/RIA or anything for that matter.

My suggestion When you shoot or attack a fort that it does not take up your training time.

How this will help the game is that you can train at a range right after your 30 minute shot timer is up from the Fort attack.

Really useful for player who have not maxed there gun and are trying to. 

If anyone has a better suggestion to this please write it here.