Effective killing range has more to do with yer hunting area than measured yardage. I hunt on my land & very seldom do i ever have a good clear killing shot past 35 yds. Most are under 30 yds. Thats not saying my CB can't kill a deer or hog or whatever at 40 or 50 yds. I practice alot out to 50 yds & i doubt i will have a 50 yd shot here but maybe when i go to Wy. fer Antelope.