Another thing you could do is switch to arrows with brass inserts. I believe the firebolts have aluminum inserts. Please correct me if Im wrong but I believe they are aluminum. If you went to the 110gr brass it will increase your FOC which is probably why the firebolts came with the heavier 150 gr heads. With the brass inserts and a 100gr - 125gr. BH & field point should get you pretty close to the same point of impact. But that would mean having to buy more arrows and new broadheads. This is just a thought. There are people on here with a lot more knowledge than me. But like I said I believe the firebolts have the much lighter aluminum inserts. Around 57gr I believe. Someone will probably chime in here again and hopefully correct me if my info isn't correct.