Re: .221 Fireball
I've got a custom .221 built on a 700 action with Hart 24" barrel. Fun as hell to shoot. Low noise and muzzle jump. Perfect for squirrels out to 300 yards, then I reach for my .223 AI.
I picked mine up used at a local shop with 2 feeding issues. It had trouble feeding from the mag, and ejecting. I quickly solved the mag feed issue with a new spring.
After playing with the extractor and ejector, I made a call to the Remington custom shop and learned a little publicized fact. Th Remington 700's factory chambered in .221 have a different bolt. (Another difference, my factory .221 action also has dual feeding ramps, whereas, my .223 C series donor has a single feeding ramp.)
The factory .221 action is on the left, .223 on the right. Notice the .221 extractor is located in the 8 o'clock position, the .223 in the 6 o'clock. Also notice the relief next to the ejector in the 12 o'clock position on the .221 and 11 o'clock on the .223.
On the .223 action, spent cases are drug thru the lug path before ejecting. The .221 case is much shorter and when drug thru the lug relief, prematurely releases from the bolt,causing a failure to eject. Remington solved this problem by altering the ejecting system so the .221 case is drawn thru a higher position above the lug recess. Alot of smiths, like the guy who built mine, don't know this difference and chamber .221 FB on .223 donors.
Anyway, feeding issues aside, its a fun cartrigde. I'd suggest you run a couple of empty cases thru the gun to check ejection. Feeding problems can be cured. If your serious about the purchase, I'd be happy to send you an empty case to check feed issues.