I shoot federal Gold Medal Match 168gr. through my .308 for now because I cant afford to reload, and frankly the GM308M shoots better than me at this time. On their website they have a bullet drop chart, but it is with the gun zeroed at 600 yds. does anyone have any information for the Sierra BTHP 168gr. from 100 out? My gun has a 26" barrel if you need to know that for velocity. Thanks for any info.