Wolf - I think that Elvis's peanut butter & banana sandwiches were also pan fried in butter! Hey, that might work with strings if you want to try the Jaco route of smearing the strings with chicken grease...
On a serious note, string gauge is not necessarily equatable with tension. So flats can go the whole range from extremely low tension (TI Jazz Flats) to high (D'Addario Chromes) to extremely high (LaBella Original 1954, formerly the James Jamerson set). Never tried Pyramid Golds, so not sure where they fit in the scheme of things. Black nylon wrapped can have extremely heavy gauges but be very low tension.
And of course, most string manufacturers don't publish tension so it's trial and error!