I also had a problem with the Win 333 or 555 value packs. The first 20 rounds just fine then it would jam up so I ran the bore snake thur and it was fine for about 20 rounds. Winchester 333 and 555 value packs use a dirty powder had to do a ful take down clean up after shoot this stuff.
I use the Federal bulk pack no problem,
also stay away from Federal Lightening and american eagle do not like 10/22's