I only have about a hundred rounds through mine, but so far so good. Since NF seems to be perpetually out of stock on their complete 9mm uppers, I decided to build one myself using all NF parts. Thought for a few bucks I would upgrade to this barrel. So far I have only used CCI 115gr 'loose bulk' ammo in it with a Sig red dot. but no issues with any of it. I have only taken it out to 100 yards, but with a 2MOA red dot from a kneeling position it keeps all shots within a 7" circle. With a trigger upgrade, rest and a scope, I'm sure those groups would shrink. It is also very easy to clean, virtually no powder fouling and Sweets got out only a very slight hint of green, so it seems to clean up very well. Worth the few dollar upgrade price!

Love mine. 147's and 158's are what I mainly shoot out of it. Barrel is easily more accurate than I ever will be. 3000 rounds in so far and my only problems are certain flat nose rounds like the speer 147g. Was told this could be remedied by cutting out a small feed ramp. I'll probably get a gunsmith to do this. Other than that barrels is 100%