Excel is good line especially for the money. I have used it for years but don't use mono much any more. It is a little stretchy, but I have used it from 4lb test to 30 lb test with no issues. Needing to "stretch" it as SilverFox suggests or having your spool too full is most likely the issue.
I pray to fish until my dying day. When it comes to my last cast, I then most humbly pray, when in the Lord's safe landing net & I'm at peace that in His mercy I be judged big enough to keep.