Question, won't 1 1/8 oz of shot overfill the shot cup on a TGT-12, if not why would anyone use a Fig-8 for 11/8 oz loads. I use nothing but TGT 12's for singles & short cap loads with Clay Dot. Would like to be able to sub them for 11/8 oz loads for singles ,if I want to go to 1 1/8 oz loads.
"won't 1 1/8 oz of shot overfill the shot cup on a TGT-12?"
Yes, but not by much.
"why would anyone use a Fig-8 for 11/8 oz loads"
The reason why you use a TGT-12 with Titegroup is that Titegroup is a very dense powder and does not take up much space in the hull, so you need a "taller" wad. Other powders that take up more space will work fine with a Figure 8.
I've found that any 1-1/8 target load works for yardage. I've loaded with several wad/powder/primer combinations and had good scores with all. The most important is to use hard shot, I prefer 7-1/2. Don't try to bump up the powder charge, it causes more harm than good. I ran out of shells one night and had to buy shells for an Annie Oakley. The only ones the range had left were WW Superlites. I bought a box and won the Annie with them.
If you compare the shot cup of a TGT with that of a Fig 8 you'll see that they are the same. The only difference is the height. The weight of the two wads are almost the same. In fact the two are interchangable, according to Hodgdon, without any adverse effects.
Cut a Nitro 27 handicap shell open and you'll find a TGT-12 residing inside.