You always find oddities with every weapon you shoot and the equipment used. The best thing to do is set up your equipment depending on the intended use. You see bench shooters using teflon tape or baby powder on the leather bags, some of which have a seam sewn in to minimize the friction. I was told that if you want to use a bipod to bench, polish a metal plate and lube the bipod legs to allow free recoil.
I found out that while using a pillow bag to rest the hand grip of my Thompson Center if I didn't use baby powder on the bag, the shots went high and right. The grip would not slide without the powder and cause it to torque the weapon.
Bipods, depending on the surface they rest on, give you different results. Firm or hard surfaces will not allow the vibrations to be absorbed as well and will affect the shot.
Set it up on how you are going to use it and practice under different conditions/positions to see what happens. I don't bench rest as in competition shooting, so I prefer a bipod or nothing at all. I do know that Gunny Hathcock prefered his pack or whatever was around to use as a rest. And I've never seen a benchrest shooter use a bipod.
Mark