We called Ruger today trying to find one of those 9.3 #1 rifles, guess what? They are not in production yet oh there may be a few around fron the shot show and stuff but they are testing the water befor doing a production run. This is typical of Ruger and drives people like me nuts. They have distributers addvertise a product that is not available and may never be.
Standard rate of twist for a 9.3 is 1 in 14 and this will not work very well with super long bullets like the Barnes X unless the velosity is low like around 2700 FPS. 1 in 12 workes much better where the 1n 20 twist came from I have no idea but I would be very suprised if it would stabilise light bullets forget the heavy ones.