I understand your speculation on the amount of variance, but I haven't seen any data to support it.
Sig's "recall" was a drop-safety issue, where in certain orientations the weight of the trigger could generate enough momentum to allow an unintentional discharge.
There's plenty of data on the variances of P320 parts being much larger than specified by Sig, and it has been presented in a few court cases. Root causing this issue to tolerances hasn't been done, though.
Sig's "recall" was a drop-safety issue, where in certain orientations the weight of the trigger could generate enough momentum to allow an unintentional discharge.