Did some Google research. Seems the SR 1911 uses a Swartz firing pin safety, like the Kimber and S&W. There is some criticism on this system. The grip safety has to be compressed for a lever to raise the firing pin block so the gun can fire.
There's not any mention of it keeping the firing pin projected too long. The SR also has a light weight titanium firing pin and a strong firing pin spring.
Some advocate replacing that system with a Colt Series 70 firing pin. I don't know about that, reportedly it's one option.
Given the more involved Swartz system, I think I'd call Ruger, maybe even send it back, especially if the new springs didn't work.
DF
