20 and 30yds look fine. 40yds would be my limit on a shot. I think the longest shot I've ever taken has been about 23 yds, and I've put 4 deer on the ground with the way it's been set. I was just a little worried about penetration with the arrow not going in square. I haven't placed a shot well enough to judge penetration on a deer as three have been spine shots and 1 through the shoulder and didn't make it through the opposite shoulder. Hopefully I can place a shot a little better this year and be able to judge penetration. If I am not satisfied I may need to shoot a heavier head or a heavier arrow. I don't have a scale but I'm guessing mine weigh about 360gr a piece give or take.