I currently shoot a 7mm rem mag 140gr. Barnes triple shock. My groups are about 3/4 in. at 100yds. , 300yds. is about my max. comfortable range. I would like to be able to go out to 500yds. I'am thinking about going to a 168gr. hsm hunting round , sending my leupold 3x10x50 back to leupold and having the CDS system installed. Am I going down the Right Path or is this a total waste of time? Obviosly I'am new to trying to shoot at a longer range any knowledgeable help would be appreciated.