Re: will heat (barrell)open up groups at 700 yards?
I shoot three, not rushed but as fast as comfortable. If you wait a full minute between shots, you will end up with a plot graph of the wind conditions of your range moreso than the accuracy potential of your rifle. Many groups of threes. With an '06 skinny heat from 5 doesn't noticeably affect groups but with a mag skinny I have had groups start to open at around 4 or 5. With a heavy barrel I still shoot groups of threes but a lot more of them.