I have a question for anyone that knows anything about archery. I have been searching online ALL week for this answer and got no help, so I am asking any of you that may know. I have a dual cam compound bow that I shoot and have it marked at a 55-60lb draw with 80% let off. I bought some arrows that are size 400 rather than 500 that I normally shoot. Is it possible to use a 125 grain broadhead and still get the 330fps without dropping off at the end of the flight or do I need to go get 100grain? I'd really hate to have to buy new broadheads so if you know, or find the answer online for me, you'd be greatly appreciated by me!! Thanks again!