Buzz,
Did you mean to say, the British braze the entire lump to the barrels instead of dovetailing ,or do I not understand.?
I believe the British dovetail the lumps themselves to the barrel flats then braze. With dovetailed you can usually see a faint braze line lateral to the lumps on the barrel flats whereas with chopperlump you will see a faint line running down the middle of the two lumps where they are usually brazed together. A Winchester 21 is soldered rather than brazed. So, with chopperlump, the lumps are made as an integral part of the barrel and with dovetail, in the british sense, the lumps are made separate from the barrels as an individual and then dovetailed to the barrel flats, then brazed. A picture is worth a thousand words; someone will hopefully post some diagrams to better explain this.
