hi I love this kozak had it 4 days(black one), great grouping at 45 yds but falls 8" over 70 yds, its a uk gun only 11.5 flbs, my AA S510 EXTRA .22 is 40 flbs and still loses about 2" over the 70yds. I have used exact heavy diablo 10.34grn not waisted in as normal, these seem more accurate...