I am considering purchasing a March scope from Bullets.com while they are still being discounted. It will be used for 100 yard BR competition. I am thinking about either their 40 or 50 fixed power scope. I would like to hear from anyone that has looked through both and your opinion between the two. I have been using a Nightforce 12 X 42 and typically have it set at 30 power. I am leaning toward the 40 but not sure if I am leaving anything on the table by not going to the 50.