been toying with getting a new ar15 as a deer hunting rifle 4 to chose from 6.5 Grendel 6.8 spc 458 socom and a 50 Beowulf want in a 16'' gun the cost between mag brass bullet and range the 458 socom and 50 Beowulf are 125 yard guns and 6.5 and 6.8 are to 225 maybe 250 yards after that they loose to much energy 458 can use standard mags a + I had one 6 or so year ago any thought ?