I have never shot bergers in mine, but RL-22 works great!! Am shooting an 85 gr. hornady at, if memory works , at about 3500 F.P.S. Works like the hammer of Thor on song dogs and deer. This is with a 25" barrel. I will dig out my records and give the exact load when I get home. This is probably the finest shooting rifle I have ever owned, I can't enough good about this rd. Has even been pressed into service on cow elk. A decent lung hit and groceries in the freezer.