My USH 20ga has shot the following groups:
Federal Barnes Expanders: 3-shot group @ 50yds .. 1/3"
5-shot group @ 50yds .. 1 3/4"
Remmington Copper Solids: 3-shot groups @ 50yds .. 1", 1 1/4", 1 3/8"
5-shot groups @ 50yds .. 1 1/8", 1 5/8"
3 shot group @ 100yd .. 1 3/8"
Remmington Premier Core-Lokt Ultra: 5-shot groups @ 50yd .. 5 1/2", 6", 5"
Lightfield Hybrid Express: 3-shot group @ 50yds ..1 7/8"
Win Supreme Part Golds: 3-shot group @ 50yds .. 2 7/8"
I have been using the Copper Solids since these results.
Hope to try the Hornady SST's this week