I have enjoyed my 6.5 Grendel's, its a fun caliber in the AR. I have two ARs built with Faxon match series barrels, and one BCA complete upper. Both of the Faxon barreled guns will shoot .5 to .75 MOA with Hornady Black ELD-M or Hornady Custom SST. Have not shot a deer yet with the 6.5 Grendel, plan to do so this season. I have used the Hornady SST bullets, either factory or hand loaded, in several calibers with good results on whitetails. I expect the same results from the SST out of the 6.5 Grendel. My plan is to keep shots less than the 300-350 yard range for whitetails.