Reported elsewhere, I fired 41 of these loads in a match.  Judging by the sounds of fire and impact, these loads are nigh as fast as .223 77gr loads.  The impact area at the club I shot at is a big stony bank and the sound of the impact comes back to you.  To me it sounded like my bullets were getting to the impact area just as quick as the fellow shooting next to me.  Not an easy thing to judge, but that's what I was hearing.  I could be wrong, I'm waiting on one of you fellows with a chronograph to tell me different!