I'm trying to remember what I found on the internet first, I think it might have been the Yahoo H&R group. From there, I found H&R Talk, and Graybeard after H&R shut down. I read about all the fun people had tinkering with these little guns (remember David Perklo's Another Fine Mess website?), and found out that a H&R distributor was having a going out of business sale around 2003 or so. I wanted a .280, and was having problems deciding on whether I wanted a 30-30 or a 45-70 to swap barrels with. I ended up buying two .280s, a 30-30, and a 45-70, because four guns had the same FFL hassle as one. I figured that one of the .280s had to interchange with one of the rimmed cartridge guns, but no such luck. The 30-30 interchanges with the 45-70, and that's it. Later, I had a chance to pick up a .223 ultra barrel on the cheap, but didn't get around to shooting it (it fit the 30-30 and 45-70) before I had a chance to buy a mint condition .223 HB with uncheckered Camo laminates. Been having lots of fun shooting the .223 with the ultra barrel, can shoot about an inch at 200 yards on a good day with cheap Winchester 45gr, and it doesn't fail to eject very often since I polished the chamber a bit. When they had the barrel sale of 2005, I sent the 30-30 frame in for nine barrels, none of which I've played with yet. I find myself unemployed this week, so it's time to blow the dust off my too many guns and have some fun with them. IIRC, I've got a 30-30AI reamer around here somewhere, and I've got three 30-30 barrels, plus a .44mag that I reamed out in 2005 with Jeff's 445 Supermag reamer. No factory 30-30 or .44 ammo, but I've got brand new dies, brass, etc to load some up.