It is a shame so many were converted into a .410. Trying to convert them back, into a proper rook caliber, is often impossible due to liner wall thickness and lack of bore diameter even in a .410. Plus many of the original calibers are for long discontinued calibers which even hand loading are a bit of extra work. You often can just line them to .22 and alter the bolt to put them back in service. I guess with the .17 rim-fire you cold go that direction. But I liked the low power nature of the original caliber, which limited their range and their being used in tighter spaces. If you bullet carries a mile you have a back stop issue.
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