i have a 21in 22 k-hornet barrel for my contender and i love it!!!
it,s killed groundhogs way out there! the longest shot was 235yds! i shoot 35 gr. v-maxes and 45gr sp,s the 35 gr v-maxes are great! if they give anything up at long range, i cant prove it. i can run them at 3200 fps, or all the way down to 2500 fps, and it,s like shooting a .22 rf. i shoot 40gr. balistic tips in my other rifles, but my contender is not happy with them.
in my opinion a .223 is way to much for squirrels unless your talking varmints. in that case the .223 is great. but for playing around, plinking reloading, and shooting edible game, the k-hornet is awsome!