Went out and fired my 30-378 wby last week. With 112 gr of retumbo it yielded 3575 fps with the 168 Tipped TSX's and .6" at 100 yards. I was very pleased! So I set the scope at 1.5" high at 100 yards theorizing a 200 yard zero.
This week I made 4 more shells just to verify zero at 200 yards.
Get this!! The group ended up on the top left (border) of the wooden target 6 inches high and 3 inches left of previous adjustment.
Due to the bullet holes on the border of the target backer the group was either .9" at 200 yards or 1.4" at 200 yards. Can not be too sure. Either is acceptable but I am puzzled at where the group ended up after I made the adjustments at 100 yards.
Optics are composed of: 20 MOA picatinny style base and Leupold 4.5x14x40mm LR VX3 scope. Tube is 30mm and I had leupold put their M1 dials on it.
What gives?
