I have the 300C with the pin at 2 inches from PAP, cg near center of grip, and box finish. Ball was great when I first got it. However, the center I bowl my leagues at added volume from track to track so the middle is a little tighter now and plays a tad more wet/dry. If I square up with the 300, it can be too early since it still flares a ton and if I move inside in the puddle it doesnt corner enough. I have tried to add a little surface but it then becomes a dud on the backend. Still playing with the surface on that ball. The issue with the 300 is the flare. I believe if the core was a little weaker I could get closer to the friction and still get some push. But the cores in the 300 (.055), Cyclone (.047), and Freezes ).047) have diffs higher than I would like. So even a weaker layout is still going to flare quite a bit. The Blur Solid is .041 so that could be a possibility. Too bad Columbia couldnt tweak the Resurgence core to put into a weaker cover with the diff at .035.