in theory, each point should be 4%, making 63 252%,
At least that is what you'd think
63 in hex is 99 though
however, you cannot add actual hex values
this has led me to believe drop rates in PC are actually limited to the dec range of hex 00-63
this creates some very obvious problems because you're missing 36 total entries (0A to 0F, 1A to 1F and so on) of percentages for drops.
the available ones are 1-9, 16 - 25, 32 - 41, 48 - 57, 64 - 73, 80 - 89, 96 - 99
Or, if 63 is actually 100% and 01 is actually 2% (for whatever reason this seems possible, considering 63 is max and there has to be a way to guarantee a drop)
This is pure speculation but since the check runs on random0-63, this might very well be a problem.