This link will help
http://www.superiorthreads.com/shop/...e/description/
Tells you what needle you should be using and that your tension settings should be for domestic and LA.
Superior threads gives a needle recommendation so the thread is not intended for bobbin use only.
If you are getting alot of breakage I recommend changing your needle to Superior's recommendation and adjusting your tension.
Here is a wonderful guide Superior offers as a quick reference for tension and needles for all their wonderful products
http://www.superiorthreads.com/media...HOME_10-10.pdf
I am not affiliated, just a very satisfied customer.