30's
I believe it is well established that a good 30BR (or a 30PPC), is just as "accurate" as a 6PPC, or even a22 PPC Short. By accuracy, I mean being able to sit down at the bench and shoot sub .200 groups.
But, as has been said, if it is no more accurate, then what's the point. The old "it's" different" thing has worn off. Regardless of how you try to down play it, the things do hit you harder. And while that might not seem much when compared to larger case capacities, it is significant when compared to the 6.
For score shooting, a 30 is the only choice as far as I am concerned. Great Bullets, Great Barrels, and that big hole it punches in the paper. It's a no-brainer.
But for group. Simplelogic is on the side of the smaller calibers.
Incidentally, I don't buy into that "the 30 stays in tune better" thing. Maybe for shooters who can't tune a 6PPC, but when you get to the top of the game, that is not the case.
Go and win some aggs in Registered Group Competition, perhaps acoupleof Two Guns, then the argument will hold a lot more water.........jackie