In a few cycles, you can produce an excellent fit.
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 OK, you have the proto chisel handle in the lathe between centers. How do
you fit the chisel on the taper to smoke 'er on?
^^^^^^^^^^^^
Several people asked essentially this same question.  If you know in advance
you're going to be doing this "smoking" technique, drive the wooden blank
with a chuck, or use a drilled wooden block on a faceplate as a "jam chuck."
It's fine to use a live center in the tailstock, but when you are ready for
the fitting/smoking part, pull the tailstock back.  If you were doing a
really long handle, like a lathe tool handle, or maybe a pruning shear
handle, then a steady-rest might be necessary.

The smoking technique would be a good way to seat the blank in a block of
scrapwood on a faceplate to hold it on the spindle.  If you are going to do
this, it's good to make a tapered fit, so as you remove material to true it
up, you go deeper into the hole, but don't wind up with a loose fit.

And then, if it does come out loose for some reason, CA glue is the
cure-all.