I have always used some pretty big stuff for long range(.300 ultra, .300 weath, & a 7rem mag) however i am thinking about buying my buddys .308 this thing shots really well( at least out to 300 yards thats as far as time has allowed me to shoot) The rifle shoots a 155 A max @ 3000 F/sec out of LC match brass very well. Assuming the rifle groups well at 700 or 800 yards would you feel confident on using it on whitetails and mule deer at that range? Thanks for your input