Here are test results for .22 slugs at 50yds. The groups did not hold for wind.
Slugs were various NSA's using the FX Impact M3.
Rifle used a superior 5.5 700mm 20204 barrel and no first regulator, FX power kit probe 20340 without spring installed.
It was quite windy with 15 to 20mph gusts while testing and raining at times. So groups that hold vertically but have horizontal spread are ones to retest. The goal of this was to get a general idea of what ranges worked with this rifle setup. From here we'll take the ones that worked and do more extensive testing around those settings. Then we'll repeat this at 100 and 200yds.
