Schmeky...
You are barking up the right tree...
But the real advantage that the Python barrels have is that they used a faster rate of twist and were (are) able to stablize the heavy bullets better. The Pythons used a 1:14, while most revolvers used 1:18. I don't know what rate of twist the 586 used, so I can't say for certin.
The Python's Trigger will get better as time goes on, by the way.
You are barking up the right tree...
I believe the Pythons edge is in the manner the barrel bore is made. Pythons have a slight decreasing diameter as the crown is approached. This ensures positive engraving of the rifling by the bullet.
But the real advantage that the Python barrels have is that they used a faster rate of twist and were (are) able to stablize the heavy bullets better. The Pythons used a 1:14, while most revolvers used 1:18. I don't know what rate of twist the 586 used, so I can't say for certin.
The Python's Trigger will get better as time goes on, by the way.