The target was shot this past Saturday by another guy. It is a thing of beauty. Don't hold my feet to the fire but I think the rifle was some 6MM. Sorry I don't know more.
On the other hand I fired my first sub 5" group at the same match. I shoot light gun with an old, old Hart rifle. This gun is number 27 of the 38 he made. It has a Hart action, Hart wood stock, Kreiger barrel with brake, chambered in 6.5X284. I use H4350 & a Sierra 142 MK. I haven't done a photo of the target but here's the score sheet. Look for Halstead.