Walther KKJ with 20 rounds of Thunderbolt .22 lr at 100 yd. The ammo barely groups 4 MOA but this is enough to practice ringing a 6" steel plate off the sticks out to 150 yd.
FYI, to move the zero from 100 yd to 150 yd, the .22 lr has such a rainbow trajectory at this distance that the Thunderbolt requires + 32 clicks 1/4 MOA to go from 100 yd zero to 150 yd (+ 8 MOA).
Dismal accuracy, but standard performance for cheap .22 lr purchased by the 500 rounds pack. At $25 for 500, it comes out to $0.05 per shot, and it works about perfect to 150 yd where it mostly stays within a 6" plate...
Try it! You will be amazed at the wonders 2,000 rounds of .22 lr off the sticks at 150 yd on a 6" plate will do to your shooting