RE: Sighting in
I've never shot powerbelts, so this is just a guess based onmy own experience with 300 grain sabbotted bullets and 100 grains T-7.
If you sight in for "dead on" at 100 yards, I would think you would be about 3/4 to 1" high at 25 yards and 75 yards, and from1 & 1/2 to 2"high at 50 yards.