Double 30,
Given the timing of my purchase and yours (2008), I strongly suspect that Remington was installing barrels that were produced by Marlin. I'm sure that Remington's purchase included existing H&R inventory. So I don't think we can really judge Remingtons production methods by these barrels. (Quality control might be another issue, but I know things were really hectic for them right after the transition.) If you send your barrel back, I will be very interested in hearing the results.
I know what you mean about loving these rifles. I've bought 2 handirifle barrels, and both have had problems, but I still find that I love this little gun. I love its handling, simplicity, and "tinkerability". My original 44mag barrel had accuracy issues and I finally sent it back after tinkering with it for a year, and I'm quite satisfied with the replacement barrel they gave me. Ain't perfect (oversize bore), but its good enough with factory ammo, and its a tack driver with hard cast bullets. And I've really enjoyed tinkering with this 223 barrel too. I just love shooting and trying different things, and this barrel has given me a lot of things to try and a lot of things to learn. And once I get an imperfect gun to shoot well, I have a sense of accomplishment. And, if I can't get it to shoot, my previous experience suggests that Remington will make it good for me.
Duane