I did. Mine was very stiff as well. I read a lot of forum info and folks just take the set screw out. The trigger return spring is bigger than the hole for the adjustment screw so it wont fall out.Did you adjust your trigger? Mine was pretty stiff out of the box and didn't improve much on adjustment.
I have also ordered an Mcabro trigger spring for it. If the gun shoots worth a **** I'll be putting in a Jard with flat face eventually. https://www.mcarbo.com/ruger-american-rifle-trigger-spring-kit.aspx
