I have used 5.56 NATO Superformance Match 75gr BTHP in service rifle matches. It's good very accurate ammo but I found it didn't help me in matches. It's a hotter load which helped with wind in slow prone at 600 yards. However what it giveth there it taketh away on the rapid strings. I found the hotter load harder to get back on target as it "bounced" the rifle more.