Mine puts every bullet I've tried with it so far into very close to the same place. So far have tried 232 Norma Oryx; 250 Barnes TSX and Nosler AccuBond; 270 Speer Hot-Cor; 286 Barnes TSX, Hornady Interlock, Norma Oryx, Nosler Partition and Solid; the 320 Woodleigh--and maybe some I've forgotten. So far they've all landed within 2" of each other at 100 yards.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck