30 Round Mag Spring Specification

[HAM]

I've been plagued with jamming caused by funky mags and decided to break them all down to clean and fix them as needed. The 15 rounders are finished and now I'm turning to the 30 round boys.

Tech Manual TM9-1276 showed the free length dimension for the 15 round springs (5.3") but does not mention the 30 round free spring length.

Might anyone know, or could tell me where I can find, the 30 round mag spring free length specification? I have tried Google and the "search" (as best I could) on this forum without success.

Regards,

HAM

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