Since I no longer own moderate velocity rifles (sold all but the .358 and .264 when I got my FFL), I couldn't tell you what lower velocities would do, although I could load them down, that doesn't represent what they would do in my guns. I assume the bullets would hold together well, but would they penetrate deeper with more weight at a lower speed? Dunno.
I actually think the Speers did quite well with the high impact speeds. Compare to the Accubond or Hornady SST. You can even see the "interlocking ring" in the Hornady jacket. I had heard good things about the 250 gr Speer from the Canadian guys who use that bullet in their .358s on moose.
This is obviously a tougher test than a deer or elk will provide, but I wanted to compare relative performance at the velocities I would be shooting them at.
