Glock 9-coil 13-round magazine spring should measure about 5-3/4". My 2004 vintage spring measured 5 inches. Ordered two new Glock springs. They measure about 6-1/4".

On the advice of a Glock armorer, rather than load 13 rounds into the mags (also have a spare), I loaded 12 in each to give the springs a break.

If you haven't evaluated the magazine springs in your EDC, it might be worth a look.