Failure to feed some 300aac brands; they get stuck. - CBC Industries 300 AAC Blackout AR-15 Barrel, 5/8x24, 1-7, Micro

I have several brands of 300 Blackout ammo I bought for twin AR Pistol builds I made with this barrel and another twin pair with Faxon 300AAC barrels. All the ammo worked fine for all guns except this barrel with Ammo Inc Stelth 300. The Stelth ammo would go into the chamber with about 1/8 inch of sticking out and the extractor could not pull it out when attempting manual cycling. The cartridge was jammed. Tried it with several samples from different boxes and they failed every time with this specific barrel only. Other ammos I tried worked OK in this barrel and the Stelth cartridges worked fine in the other barrels. The fault is the barrel and it's headroom manufacturing is not precise. I should have known better when I saw how I expensive these CBC barrels are.