Why would you go to the trouble of making jump rings when all
you have to do is cut equal lengths of the same gauge wire??
It's a lot quicker to make a bunch of jump rings - you make the
coil, saw it apart, and you have a slew of pieces all the same size.
Whereas if you have to measure and cut, measure and cut, measure and
cut.... makes my hands hurt just to think about it, LOL!
Even if you use a pipe or something to measure the pieces as you cut
them off, its just easier (for me at least) to make the coil. Since
I already have dozens of different size mandrels (ok, maybe a COUPLE
dozen) I've got the flexibility of being able to easily make jump
rings in loads of different sizes. Besides, I use jump rings ALL THE
TIME, so I've actually probably already got hundreds made in any
given size. They're also easier to handle than snippets of wire.
I do love old film containers and baby food jars...
There's another benefit - you'll always know (after the first set)
what size beads you'll get from jump rings made on a mandrel of size
X. And size Y. and size Z. etc. Cuts down a lot on how much
measuring you need to do.