Tubes....
John,.... I too have been confused by when to choose to use a plastic or metal tube. The metal tubes don't appear to be heavy enough to make a difference in depth while trolling or using a fast retrieve. Using a plastic tube without a separate weight means the fly would probably ride in the surface film. Carls comments about how he uses them makes sense.
When I started using tubes to tie flies on, there were copper tubes lined with plastic(??). They were anywhere from 1" to 3" in length and relatively heavy. Plastic or whatever material tubes were available as well. Now, I don't seem to be able to find the metal tubes for sale any longer. I don't bother using tube flies any longer unless under special situations.
"America is a country which produces citizens who will cross the ocean to fight for democracy but won't cross the street to vote."
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