I shoot berger bullets and they perform flawlessly. I shoot the 190's in my 300 WM and I would put it up against any varmint rig. It CONSISTENTLY shoots sub 1/2 MOA at 100 yards and much better at longer ranges. I shot two groups that were under 2" at 600 yards last weekend. If I do my part, it will hold 1/4 MOA at 100; although, this was much easier when I shot the 168's. I have only killed one big game animal with them, but it worked perfectly. Put down my wyoming mule deer from 645 yards with a 140 out of 6.5x284 last month. BTW, my rifles where build around the bullet. Optimum twist for bullet and match grade barrels. You also may have to adjust seating depth to get extreme accuracy. Mine are jammed and still fit comfortably in the magazine, another plus to having a custom barrel throated for the desired overall length of your cartridge.