Originally Posted by glennhl

Curious, what makes the Square RC rings not flex (I assume you meant less flexible, it's not possible to have zero flex). Are they thicker than the old rings? Remember, even if it's a harder material or stronger, that doesn't change the flex as long as you are not exceeding the strength of the material (then it will have permanent deformation). The flex is a function of the load, the cross sectional inertia of the ring, and the elastic modulus of the steel (and again, the E of steel is around 29,000,000 psi regardless of the strength or hardness). Given all of this, I have to assume that the rings are thicker.