Rifling video

It isn't. Do you think he could hammer that punch through a 24" rifle barrel, or even a 7 1/2 inch revolver barrel?
I guess you could say it is conceptually equivalent to industrial button rifling, but mostly just a showoff. There was a similar video once about DIY making a forge welded damascus barrel. It was about 4" long, too.
 
I liked the video and I liked the comments on the video.
This site has a lot of interesting stuff.
Thanks for posting.
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Just a mildly humorous postscript: The first time somebody told me about hammer forging a barrel I thought they were kidding me and I didn't believe it could work.
 
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