I recently tested a fmj against a plated bullet. both from the same 226sig, both 9mm at 15yds through 3/4" mdf target. bullet 1 was a hornady 115gr. fmj rn. "target projectile" the other from barry's plated bullets 115gr plated rn. expansion for the hornady was .642"a gain of .29" in diameter. while the plated bullet expansion was .455 a gain of .10". weight retention for the hornady fmj was 108gr. while the plated was 111gr. I did not have any hollow points on me at the time, but i cannot imagine they would keep as much mass or expand any further than the hornady fmj did. has anyone tested a quality fmj against a hollow point of the same weight and caliber? i would be interested in seing the results.