I have been extensively using the 6.5 cal. 140 amax. Have tried the VLD 140 bergers a little and wanted to buy some more, but corrected BC is about the same as that of the sierra 142 MK. Bergers are harder to find and more expensive. Does anyone have experience with the results of the 142 MK on game past 800 yds?? or closer but over say 400 yds?? Comments are appreciated. Thanls.