I haven't noticed this effect, but I don't touch type properly anyway. My hands fly around in the "hovering style" above the keyboard, instead of resting on home row like you're supposed to. My own rules for which fingers hit what keys are more complex than I myself understand! It's not elegant, but it works and plenty fast enough for me.
My guess is what you're really feeling is leverage. That finger is the longest of the bunch.
Oh, wait, I completely misread your description. You're talking about your ring finger? Well, that is weird! I use mine less in typing because they are inherently less dextrous, and indeed shorter, than the index and middle fingers. They are very far from being my strongest fingers in any sense!