In past year, i have used the 270g Deep Curl in an X7 that had a scope mounted. It really really put the hurt on deer. Am not sure, but i think this rifle with the peep sight, lands them 270g bullet low. There is no moving this peep any higher; it is as high as it can go right now. However, you can 'know', the 270g bullet is one very fine deer smucker.