A loaded corner should still give you some sense of how the steering force changes. When force feedback clips, the signal hits its ceiling and any demand above that ceiling produces the same maximum output. The wheel may feel heavy while giving you less detail about what changed in the corner.
Find a corner you can repeat
Start within your wheelbase maker’s operating guidance and use a comfortable force level. Save your current settings, then run a familiar car through a long bend where the steering usually feels heavy. If your simulator shows a force meter, check it on a replay where supported or have someone watch while you drive. A quick peak over a bump and a meter that stays pinned through the bend are different observations. iRacing’s controller setup guide describes its meter and how its automatic calibration works.
Adjust one control and run it again
Reduce the simulator’s force feedback gain in small steps, following the sim and wheelbase instructions. Keep the same car and the rest of your settings for the comparison. See whether the meter spends less time at its limit and whether you can feel more of the change in load as you unwind the wheel. Stop at a level you can control comfortably for a full session.
Save the result alongside the car and track you used. If you also noticed the wheel deck moving, deal with that separately using the mounting manual. As with other rig changes, repeating the same test makes it easier to separate a hardware problem from a setting.