What you need to know is the "exact" length of your chamber. That will tell you how long your brass can get before it "needs" to be trimmed. And the type of dies you use makes a difference on how much your brass grows.
Standard full length dies with the neck expander ball pulls the neck area longer every time you resize. If you shoulder bump and neck size, you can keep brass growth to a minimum.
I've got brass that has been resized 20+ times and still hasn't needed to be trimmed.
Example: 6BR/22BR that the max trim length is 1.560. "Actual" measured chamber length is 1.585. That leaves me "lots" of room before I have to start thinking about trimming brass. And my brass lasts longer. 8)