Before 260 became a favorite for LR i used quality 243 brass and ran it through the 260 sizer. I shot for a long time using 243 brass and best outing was 20 shots inside a dime at 300 yds usinh aa2700/243 brass/ and 130 berger match vld. I have 260 brass but havent touched it because my stock of 243 brass hasnt dwindled down to that point.
South Texas Trophy Outfitters
Contact #: 210-837-6742