The 30 and 50s may be Ram-Lines. I don't think BC makes the larger caps.
The BCs are excellent. I ran 500 rounds through the six I have yesterday with out a glitch (Hot Lips). The steel lips are worth the extra cash as they will last far longer, yet all the plastic lip versions I have (old 10 rounders) have yet to show any appreciable wear.
The only thing with the BCs are they should be loaded and stored for a few days before use. When you first load and de-load them you will notice overly loose rounds at times, or failure to "push-up". When the sheet spring is fully smoothed out, they work flawlessly.
Another thing I have personally experienced, is that hi-caps will cause you to go through more rounds per outing, and any wear and tear on the 10/22 will become apparent faster. One part in particular, the extractor. The original Ruger part is not the greatest for durability. Get a Volq or Power Custom, and you will rarely have any jams, or stovepipes.
Good luck,
Michael
If guns cause crime, than all of mine are defective... - Ted Nugent