I have swapped many different barrels onto my W&H BC without any problems. It is an early one from the first run.
I don't know what year mine is from. Not even sure what year it was made. But I found it seemingly unfired and even the dovetail filler was still in the front sight slot. Did have a light scratch here and there. Bought it anyway. It was right after Newtown, so I grabbed it anyway.
Thought I wanted the ejector at the time. In retrospect, I think might have preferred one with an extractor rather than an ejector. But, haven't seen an Illion made one up close.
Do have an Illion Handi-Rifle in 45-70 though. No complaints on that one other than I prefer a hard butt plate rather than a recoil pad. I like all the gun's parts to be resistant to aging, and as close to "scrubbable" for cleaning as possible. Rubber recoil pads seem to collect grunge and look bad over time.
Anyway, wanted one of each length and buttstock style.
I do think the Handi probably is more handy in the field though. But for reasons irrational I still like the BC. I like straight stocks at times.
So it got me to thinking, maybe it could be home to a shorter barrel in another caliber. '06, .243, .30 WCF, etc. Maybe even .44 mag or other large handgun caliber.
Bums me out that they moved production to Illion and then turned around and stopped making them and H&R Shotguns.
It amazes me that the market dropped off enough to close the line down. I thought H&R products would be available new in box for the next 100 years, LOL!