I' ve used both the 125 grain vortex and the hammerhead.I think the vortex did better in the tests because it is a sturdier head no doubt.Remember though it is a two blade head vs the 3 blade rocket.The only thing I did' nt care for on the vortex is the steep blade angle.I found that if I hit the off shoulder it stopped the vortex.The rocket with the blades angled back further would tend to glance off and keep going.That being said,I never lost one with the vortex due to lack of penetration.If you have alot of KE it is a good head.

CB