I shoot the 18.13gr and the 15.83gr and they hit the target consistently in the same group size but the 15.83gr stays a bit flatter. The issue I had was the 18.13gr above 900ft/s to be sure 920ft/s was not my unicorn speed for 100yrdsBelow is a 20 shot group at 50yards
Here's some 3 shot strings I did earlier today at 40 yards. It's pretty clear my Gauntlet favors the 18.13 grain JSB's!