Goex Pinnacle is made in cooperation by Goex through American Pioneer Powder. The same people (APP) that makes the Shockey Gold. I've shot a lot of Pinnacle in 3f grade. In the 2f grade you will find it very course. Almost like fish gravel. In fact out of some funnel powder measures the granules are too large to pour.
As for shooting conicals with it.. it is not a fast burning powder like the Triple Se7en powder is. For conicals, I would stick with Triple Se7en 3f, Pyrodex P or Goex 3f. If all you can find is Pinnacle or JSG they are both going to shoot about the same.
You do not have to swab with either the Pinnacle or the JSG powder. You might have better luck shooting a sabot with these powders, but all you can do is try. With the powerbelts try about 80 grains of powder and see how they work.