The issue here is the fact that Ruger cuts their forcing cones to 5 degrees compared to 8 degrees on Smith & Wessons. This tends to be a good angle for jacketed rounds but tends to contribute to lead spitting. Every person whom I am aware of that shoots a lot of lead boolits that has had the 11 degree recut performed has reported the lead spitting eliminated.
I seriously doubt Ruger themselves will perform the 11 degree recut. It is like going to a car dealer and telling them you want them to install a supercharger or nitrous oxide kit on your car. What you want to do is first try to find a local smith that will perform the recut. If none are available, then your only option is to have the gun shipped to a place like Alpha Precision. And since it has to go overnight air both ways, that will cost you a lot of cash.