I agree with Bingo. At 50 Yds. 4X is way too much and 2X is not enough for 100-150 Yds. Thus, I ended up with the Burris variable WITH lockable adjustment for my BFR in .450 Marlin caliber. I really like this scope. Never any problems after 100's of rounds. Just remember to unlock the adjustments before trying to adjust. I also agree with Gary that the burris is a little heavier but being problem free with a heavy recoil is worth the peace of mind to me.