If you do the calculation based on that stuff without feedback effects and CO2 goes from the present ~432 ppm to 600 ppm, then (disclaimer - AI used) you'd get

If you do the calculation based on that stuff without feedback effects and CO2 goes from the present ~432 ppm to 600 ppm, then (disclaimer - AI used) you'd get approx 1.1 to 1.2C of warming based on basic radiative forcing alone. Which isn't really a lot to panic over in my opinion. I mean you may get feedback making things worse or not as bad - that's a bit uncertain.