Steve, I conjured up my current TK load with #9 TSS. I was never able to get an acceptable shot density ( that I prefer ) with published data. Tried lots of powders,wads, OP wads , shot, size of shot ,,etc etc.
I dialed in with BPI's RE wad trimmed to shot column height which was 1 7/5 oz #9 18gm TSS and #47 buffer compound.
I used a piece of 12 ga barrel to hold the RE wad. Dump the #9 shot in.
Then added buffer tapping the barrel piece vibrating the buffer until it filled to the top of the shot.
This gave me an overall length for the wad. Trim wad to length.
I made some weight measurements of the shot vs buffer as to see how much buffer was needed.
Once known , used a Lee dipper for the buffer then. Easier to make up loads now.
1/8 OP wad and thin OS card.
90grn Black MZ. Yup Black MZ
From results at 40 yds I'd do 60yds.
One thing else I forgot to mention while range load development, I bought a Lead Sled ! LOL
What can you tell me about your TK loads please?