I've got a slew of lefty Ruger rifles. My old MKII 30-06 is blue and super smooth but you have to bench press 400 lbs to handle the trigger. My blued Scout rifle was rough to start but has smoothed out decently and the trigger is very good out of box. I've got a few stainless others and they are more rough for certain and not as smooth.

There is one exception and that's a 270 win Hawkeye I picked up here used and it's stainless. It's smooth and polished up well and yeah the trigger is light and probably was worked on. It's the exception in stainless. Another one I have is a lefty 338RCM Hawkeye compact rifle that's blued. This is the best rifle I own on fit and handling. Smooth operating and good trigger but the dimensions and feel are amazjng.