I vote we scrap the US rules and adopt and follow the WFTF rules ... like the rest of the world does.
To level the FT game in the USA by using sub 12ft lb airguns for competition - then we only have 2 classes - PCP and Springer.
And for HFT the there are well established rules as well for that game UKHFT
Otherwise there is NO level playing field and there never will be.
Just my .2c worth ... don't hate me for it .. I shoot WFTF Springer as it is - usually in my class of me myself and I.