My father in law shoots a factory XP100 7BR with a Leupold 2.5x-8x for IHMSA, he routinely shoots 40x40's in the half-size category with factory brass and 150gr bullets. They're accurate guns and barrel/brass life is excellent. Chamber dimensions are generous however, and we've found that brass fired in his gun won't chamber in my wife's Wichita 7BR.
