Interesting Chart from Whiteline.
Explains that for adjustable RSB, add 1mm of diameter thickness for the “harder” hole setting.
I can see now how a 22mm RSB can offer a slight increase over factory- because of the adjustability.
https://www.whiteline.com.au/docs/bulletins/Update BL-281.pdf
So for Whiteline 22mm RSB (adjustable);
Using the solid 20mm PP factory as a baseline;
46% rate increase on “soft”
75% increase on “hard”
A mild upgrade.
That 40 something % increase was mentioned earlier in this thread. The chart confirms the extrapolation.
Using the chart, one would assume that the popular 24mm H&R RSB offers a 107% increased rate over Factory.