yep. diminishing returns is really the best way to say it. I own some severely overbore wildcats for use on groundhogs and other pests but I can't say that I favor them for target or match use. I also have learned through bitter experience not to chamber up anything that overbore in a tight twist barrel. My favorite 6mm round is still the 6br in its unmodified form. The hot 6s so popular today in PRS and across the course matches have definite advantages. Sadly, I buy my own barrels. With that in mind, I won't be competing with anything that I won't see at least 2500 rounds out of a tube.