I have no experience with either one. Which would you choose for a bolt action 6.5 Grendel???

Are you hunting, paper punching, ringing steel at long range?

Dave,
Hunting, paper punching to sight in, minor plinking, no steel ringing. No LONG range shooting.

After doing some more research and reading the 100 or so reviews on the Hornady SST and AMAX Grendel ammo on Midway I ordered 200 Hornady SSTs. Couldn't beat the price. If they shoot well in my rifle great. If not I have components.

At Grendel velocities the A-Max should work very well on game. I have had very impressive accuracy form the 123 A-Max in the .260, 6.5x284, and 6.5-06. The SST has also been pretty good and to be honest, I have not noticed the SST to be any less violent in expansion than the A-Max. I think you would be happy with either from the Grendel. If you ever find a deal on the 100 grain Partition, they are excellent on game.

Received my ammo. Will haul it to MO over Christmas then on to TX and do some testing.