In reply to:

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There were also some barrel jointing systems that did not employ "welding" at all(i.e brazing/soldering)at all. BSA used a system in which the Chopper lumps were coupled by a vertical dovetail and pinned. This system was also adopted by Winchester on their Model 21 Shotgun.

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This is true! The B. Searcy rifles are threaded into the mono-block, not soldered, or welded! The lumps in that case is one piece with the mono-block, and are not affixed to the block seperately!