Be aware that tracer rounds, due to both the manufacturing process and the fact that as they burn during flight they get lighter and wobble, are no where near as accurate as normal ammo. My BCM upper will shoot sub 3/4" groups at 100 yards with 62gr and 77gr reloads. The best reload tracer group I've gotten was 2". At 300 yards it's far worse. They are literally barely minute of man. I can just about keep all of them on a IDPA target from the same rifle.
If you're stashing them I would try to shoot at least a mag each at 100, 200 and 300 just to understand what they are going to do.