Go to the expense report help section under "deviation Section". Example 1 covers your question. The answer is yes you can use bank money to travel to Mem for any trip, training, or reserve duty; the 3 day rule would apply.
https://pilot.fedex.com/fox/pilot/pilotsHome.jsf# You have to go to the travel reports tab and click help in the upper left corner, then select deviation section.
Of course past experience shows the company can change their interpretation at will and the CE guys will roll over.