I only right now am making 1 to 2 lbs. at any one time. ( that may soon Change )
I just use a pair of side cutter diagonal wire cutters to break up the pucks.
And the advantage is.
On the first nip, I can tell if the puck is Softer than the others.
I set that one aside, and grind it separate.
That seems to make my general supply of powder a little more consistent on the hotter side.
But that also depends on how many softer pucks you ended up in your pressing.
Too me, one or two in a pound does make a difference.
They either gum up the grinder, or make you grind the harder powder too long and end up with too fine of powder from what you want.