Moser vs Strange

I use moser 9" shafts in my Jeep Wrangler with 4.56 gearing and a detroit locker. Small block mopar 360 that is a mild build. I spin 39.5" tires that are 13.5" wide on beadlock steel wheels. Thats over 150lbs per tire. I have never broken a shaft bouncing the rear in 4 low. I even air down to 2 psi.