I'm undecided too Peter, I keep trying both, but I'm erring (is that spelt correctly??) on sawing from the outside. I only saw small numbers at a time, probably 1-2 dozen, mostly in 0.8mm round wire with ID 1-1.8mm (for tiny connecting rings and for pearl caps), I do have some difficulty keeping hold of these!!

Due to the small numbers, I deburr each by hand.