Sure, just use a bolt with a higher tensile strength. I'm no firearms engineer, but I'd guess that most action screws are equivalent to Grade 2, medium carbon steel. Grade 8 bolts will have double the tensile strength and triple the yield strength.
I would also guess if you do this you'd ultimately just strip the threads in the action; there's going to be a point at which the tensile force needed to torque the bolt (which is just an indirect way of measuring bolt stretch after all) will be greater than the thread strength. Just substituting higher grade bolts without the whole system being designed for it seems like a recipe to break something. The stock would also not presumably be intended to take the higher compressive force either.
As Jerry says, the best solution to pursue is the time tested and proven one; stress free bedding. More torque to eliminate movement just sounds like more stress to me.
I would also guess if you do this you'd ultimately just strip the threads in the action; there's going to be a point at which the tensile force needed to torque the bolt (which is just an indirect way of measuring bolt stretch after all) will be greater than the thread strength. Just substituting higher grade bolts without the whole system being designed for it seems like a recipe to break something. The stock would also not presumably be intended to take the higher compressive force either.
As Jerry says, the best solution to pursue is the time tested and proven one; stress free bedding. More torque to eliminate movement just sounds like more stress to me.
