I feel they are hit and miss. I owned one. Love the look. Bought 5 additional magazines for it as I was going to use it for PCC matches. Whether handloads or commercial ammo (Winchester Whitebox, PMC Bronze, Blazer brass, Blazer Aluminum), I could not shoot a full magazine without a FTE, FTF, or other issue. Read so many online reports - some people had no issues (or so they claimed). Some said only use 147gr projectiles (tried that - didn't work for me). Since I handload I tried 115gr projectiles with min load all the way to max load. FTE or FTF every single magazine.
One of the most frustrating rifles I have owned.
My thought is it's the magazine angle. The rounds point "up" too much - the magazine well should have been tilted more towards the barrel so the next round would be more aimed at the chamber.
I still love the looks of these firearms (I'm a big M1 Carbine fan). But ended going with a Ruger PCC with pretty much no issues with commercial or my handloaded ammo.
YMMV