Dear Donna,
Hi!
I tumble my jumprings for about 4 hours, then make them into jewellery and tumble them again for 15-30 minutes to make them nice and sparkly, I work pretty small, but I haven't had problems when using DS wire.
I only solder larger rings made from thin wire, or twisted wire rings, I bought some paste solder which makes this easier to position and I use one of those little creme brulee type torches which run on butane lighter fuel at home. Hope this helps, I have been cutting and coiling rings myself this week.
Love, Jan