I thought of sighting it in at a different distance, to compensate for the drop, but I was trying more to figure a way to allow for a flat trajec. at 30 yds, if possible. I am going to buy a chronograph so I can figure the exact kinetic energy (this gives me a reason to buy one instead of having an excuse to buy one). The arrows that came with the crossbow were 2013's, I used the 2117 because I had some old ones laying around, to start this trial with.