Both my Ruger MkI, and the Marlin 881 shoot well in both accuracy and in feeding and ejecting with the Federal Champion 510, Federal Lightning, 510b, and with CCI Blazers.
I have tried others that are more expensive, and some work just as well, and others that do not. To buy the expensive stuff is just a waste of money for me.
Yea... Thunderbolts are junk! And darn dirty!!!
Federal Lightning 510b, $1.47 for a box of 50 at Wal Mart.