Glad you got some good readings.

When the power is too low and the SWR reflected power being a small % of the forward power can be largely dissipated in the loss of the coax and or too little power to be read by the reflected power meter to produce an accurate SWR. Based on my radio, you need about 10% to get about 5-7 watts.

Be mindful of this if you ever hook to up to an amp using an external tuner. The TUNE cycle uses 6 watts ( not 6%)  and the tuner tunes using that. But then when you use the amp and many hundreds of watts, the SWR goes much higher because the tune solution was based on a meter in the external tuner that just simply is not sensitive enough to measure the reflected power with 6 watts forward power but it very much measures the reflected power at 500 watts forward and shows the SWR is not good ( like you thought it was ) and the amp trips off for bad SWR. All because the reflected power sensing circuit is not sensitive enough to measure a small amount of reflected power reflected from a 6 watt carrier and the IC-7300 uses a fixed 6 watt carrier for the tune cycle.

That's good to know. Thanks for the info and your help, as well as everyone else who chimed in.