No time now, but here’s a link to the chart, just so you know where I got it.
http://anthro.palomar.edu/time/table_of_isotopes.htm
“why aren’t they?” You’re the one implying that they’re not. I don’t see anywhere where these other isotopes have been rejected for any reason, and since they all use the same assumptions of uniformity of decay rates, known starting quantities, assumption of no leaching, they should all yield pretty much the same results, but rarely do.
I'll ask one more time just to make sure you're not intentially avoiding answering the question - HOW MUCH DO THE RESULTS VARY??????