How well would a 1-8 twist 6 br with 105-107s shoot at close range 100-200yds i know it will do much better at long range than my 1-14 with the 68s will, there terrible in the wind but i was a little concerned about the heavy bullets in close we shoot animal targets for score from 100-415yds if they will group 1/2" or less that would be great also im planning on doing some shooting between 750-1000yds if it was 415 and in i would consider a 1-10 or 1-12 twist .