Ok, the only "factory ammo" that I've shot through mine is milsurp stuff - 7.62 NATO. My Paw-in-Law has a M1A that he likes to shoot, and has a few milsurps laying around (165gr. full metal jackets). They shoot fantastic out of the Encore, but boy do they snort! Lots of fun! Throws a big fireball about 2 feet wide and 4 feet out the front. Groups great though, 3" groups at 100 yards.
The only thing that I can tell you that shoots poorly in my Encore is 180 grain cast lead bullets. Whether it's the powder combo or the rifling twist, I can't tell you. Shoots 150 grain cast lead fine with Reloader 7.
As long as you are accomplishing your intended task, I would say don't worry about it, the TC's seem to shoot well with almost anything you shove into them!
Have fun!