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Plus you will have been using oxy-fuel. I think the question was is MAPP enough for brass, which it isn't. The key with lugs is getting a relatively large area up to a consistent heat quickly enough to not sequester the flux before the silver has flowed. Ceeway sells practice lugs and tubes. I'd suggest buying a load and practicing with whatever gas you are going to use.
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Tonts
Brass rod flows fine in my very limited experience, just heat the lugs up enough to draw it through. I did the dave yates framebuilding course and I'm pretty sure I used brass for the BB shell (the rest of it was fillet brazed).
Edit: Mind you it was a few years ago and a lot has happened since then, so I could be mistaken.