I've had good luck with decent accuracy in the few #1 Rugers I've owned. Those I know who have built them for competitive shooting have all gone to the heaviest barrel contour they could fit with the hanger and told me the heavy barrel usually fixes any issues the hanger might cause.
I tried doing the DeHaas fix on one that tended to string shots a little as it got heated up. I D&T the hanger for a setscrew and locknut, and tried various amounts of pressure to see if it would decrease the issue of groups opening up as the barrel heated up. But I never got a definitive decrease in group size that would tell me it worked. I still think the heavy barrel is the best for obtaining higher accuracy for competitive shooting. For casual shooting, or hunting, they're fine as is.
