Originally Posted by j_bliss99
However, I believe I might know the answer to your question, 44 AMP, if it is as simple as I am thinking; is it because the greater amount of momentum in heavier bullets keeps them going in a straighter line?
Not quite. And it could be very difficult to answer this question if this is your first physics class (which I am assuming that it is). However, by then end of this project (or this school year) you will certainly understand the reasoning why this occurs.