If you fool with rifles and chronographs long enough, you'll find that the "advertised" load thing is pretty much a myth. I've seen some loads "under preform" by a bunch, and some "over preform" by a like amount. For some reason, my 243's most always seem to do better than what the manuals claim while the 7-08 often does less. But, when the dust is settled and smoke has cleared, there are a lot more important factors than a few more fps of velocity.
