Charlest,
Good luck with your drilling experiment, either way you go.
I have used the pin axis drilling before. It is extremely smooth, and rolly, just as others on here have already spoken of. The problem was carry, more than anything else. I had to be extremely accurate to say it was successful. For me, this drilling was condition specific.
I do have three balls drilled in the "barbell" layout Nicanor spoke of. They were much more useful,....and on a variety of conditions, with a fairly even reaction all the way down the lane.
Good luck with your selection.
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Duct tape is like 'The Force'. It has a light side and a dark side, but it still holds the universe together.
Some days you're the bug some days you're the windshield.