You are going to test the 420 grain (I assume LBT-type), and another I would like to see included is the Speer 300 grain Unicor, now called the Plinker.

Or maybe not. They are kind of a sleeper, and if everybody finds out about them, I won't be able to get any!! (grin)

Those are the two bullets I have pretty much settled on in my .45-70, the rest I use as plinkers in my .458 SOCOM.