The subject of activ hull data comes up on occasion. Last night I found my Activ reloading booklet. I will put the 6 scanned pages here.
There is not T-42 data in the booklet. Reducing by 5% the data for the Remington RP12 and SP12 wad works when subing the T-42--in 1 3/8 & 1 1/2 oz loads in AA hulls. FWIW.