The average grouping with the REAL 320 gr was ( at 100 yds) right around the 4 inch range. That pic was the tightest group of the afternoon. With a scope it would undoubtably been tighter, but with the peep sight, the 8" target was little more than a dot at 100 yds. 75 was good, 50 yds was even better. I could keep a ragged hole going at 50.
I experimented with different charges, but couldn't tell any real difference in accuracy between 80-90 grains. I chose to stay with the 90 just because of a bit more oomph on impact.