It also appears Hornady is trying to beat Sierra at their own game with the 168 HP match bullet. The Hornady's are ever so slightly longer for a bit more B.C. and run a bit faster over the screens. Accuracy is almost equal with a very slim edge to the Sierras. The Hornady tested sub 1/2 MOA for 5 shots at 100yds from my 26" heavy barrel test platform
Hornady's been chasing Sierra for a long time now. Back in the 50's, Sierra produced their 168 International...and Hornady decided they needed a 168 too (as did Speer). At least they used a slightly different secant ogive versus the Sierra's tangent ogive.
Back in the late 70's-early 80's, when Lake City was fielding a new match 7.62 round, they tested the various flavors of 168ish bullets including the 168 Hornady and the Lapua D46. In the end, they found that the 168 Sierra's shot tighter on average and the Sierra's were selected for the M852 Match rounds.
Hornady to their credit has continued to push the development envelope with newer and better designs. ie A-Max, ELD, etc.