A purpose built benchrest rifle and ammunition loaded to an appropriate standard, all being fired from a competition rest and bags, may be able to resolve the precision advantage of using "just enough" twist with a specific bullet. I sincerely doubt a sporter weight/configuration rifle could resolve that fine difference, and it will miss the flexibility afforded by a tighter twist.
That's exactly what I had... I used my guns for competition and I was dead serious. Had I used a more versatile twist, I would have got results that would never let me win anything. I was only interested in the smallest possible groups at the 100 and 200 yd. ranges at which we competed.
